Re: DA2 doesn't launch
If you have AVG or even some other anti-viruses then you may need to put both the install folder for the game AND the new EA Play app into exclusions/white listings. I have also found that being in online mode for DA2 for me means a 6 minute wait for the game to launch once I click on play. It will bring up the "launching popup" and I can close it or not but it will take almost 6 minutes before another popup about cloud saves being full and then I need to click continue with locals saves and finally the game will launch.
BUT I just found out tonight that if I put EA Play into offline mode, the game launches immediately for me.
IF none of this makes any difference, then maybe a DxDiag file may shed some light on your computer and errors happening.