Sonic Runners is great. I'm glad its finally available worldwide, I played it at first, but couldn't be bothered to download another APK. Runs the same as it did on my phone when i first played it. No new issues on my end. Laggy as ever, just signs that i need to get a new phone.
Ad's and other changes from the soft launch were to be expected, SEGA has to make money somehow. The ad's aren't that bad though. I can deal with them, its the ad's on Hardlight's games that I can't deal with. I wonder why SEGA made those games so ad spammy.
Also, there is a lot of objects on screen compared to other mobile games, and you can get going quite fast. Most mobile devs wouldnt try to push hardware like that, but you know, that's the Sonic Team way. So it's no surprise some phones are heating up so fast that their fail safes aren't even kicking in.