Now let's list the mistakes that Jeffery made...
Unlike SOE he didn't make wise investments...
Secret Level was the perfect example. Wasted 30 million on a studio that didn't last very long. If he had waited he could have gotten Midway when they were up for sale..
Too many contracts for lots of games that ended up in development hell and canned and sacked...
This was the real reason he ended up resigning because the money that Sammy gave to the subsidiaries was a lot and he rewarded it on companies that obviously didn't or weren't able to deliver on time..including Silicon Knights, Gearbox and Edge of Reality.
https://www.youtube.com/watch?v=th_dd_0hhzsCYPHER COMPLEX one of many games from SOA that got canned during Jeffery's reign of SOA.
Shitty Sonic spin offs...western interpratation
NIGHTS 2 was part of many games SOA was charged to remake for western appeal along with GOLDEN AXE and several others. The result was SONIC RIVALS SUPER MONKEY BALL ADVENTURES and other terrible iterations. Sonic Team took NIGHTS 2 themselves under their usa division..and screwed it up.
Also what happened with VECTOR MAN 3 for PS2 was also a major f up...
Not maintaing games that did work or fucking up a games chances
UNIVERSE AT WAR was a big screw up..a potential franchise that Sega of America messed up by insisting that a console version was needed and the rest was history. FULL AUTO was a classic example of not striking when the iron was hot...first by creating an PS3 only exclusive sequel which denied 360 fans as FULL AUTO was one of the early 360 games that people seemed to like and then bypassing a third game...which led to the creators folding up shop.
Sega.com
Not restructuring the website or linking it to their american arcade division or Gameworks division(one of the things Segasammy did when it was formed was gain full control of that amusement chain) This was something Kalinske and the old SOA would never let pas up as it was a golden opportunity to promote games...IE VIRTUA FIGHTER 5 when that came out could have easily been used to promote the game and tie in their arcade part by holding tourneys or whatever at gameworks centers where fans could have attended and tried out the game..
Not promoting the good games and promoting the crap games..
Marvel is the best example. The Marvel DS games were all brilliant..especially THOR..yet they focused on the titles that weren't that good on console. Picking rubbish developers to make the game in the first place..even though in the case of SL they didn't have the time to really tune that game because Marvel wanted the game out at a certain time. Even ALIENS had that problem..ALIENS INFESTATION was one of the better titles that Sega hardly promoted. This trend continued with SHINOBI 3DS way after Jeffery left..
YAKUZA
The localization of that game more than likely confirmed Nagoshi's fears about SOA not getting it..especially when Nagoshi was meant to reveal the game at E3 and not japan as was originally intended. But he didn't like the way the promotional staff was going to promote the game. Once the game got localized with plenty of good strong actors..it was a horrid dubbed mess. Swear words where none had been before and other nonsense..did more damage to YAKUZA's chances in the west .
After Jeffery...
The ECCO debacle
When two of the best creators from SOA past wanted to do an ECCO game you don't say no from the get go...this was another example of how SOA had fallen..just like the infamous.."what's STREETS OF RAGE" incident during the DC era. No appreciation of what went on before..and no clue has hindered SOA progress in modern times compared to SOE...
TOE JAM AND EARL
Another debacle....the guys approached Sega over a DS game which Sega refused to support...then when SONIC AND ALL STARS RACING came out and fans wanted to see TJ AND EARL in the game...SOA manged to screw that up as well.
The failure to bring SOJ games that could have worked in the west...
During the mid noughties Sega hit pay dirt in the pokomon rip off gravy train with the arcade game MUSHI KING and its GBA and NDS rpg game MUSHI KING. But they also had another game that was just as popular..LOVE AND BERRY. Now while MUSHI KING probably wouldn't have translated well in the western american market..LOVE AND BERRY could have especially with all the girl games that was coming out in the west during that time. SOA totally missed the boat on it..no thanks to SOJ. They also failed to exploit the popularity of BUKAGAN over here by not only bypassing the games rights to Activision who made decent money out of it..but the fact that Sega effectivly made the anime with TMS which was owned by Sega as well. Again Kalinske would never have made such a F up. This was also during Jeffery's reign oddly enough..