No shit, Sherlock. The OB engine obviously works totally different from the old engine. Pretty much all the .smx sourcemod plugins are useless now till they get updated.
The .smx files work fine, just the game offset had to be be fixed and the binary extensions replaced with orangebox versions.
We are still having an eye on some crash bugs, but I think we will be able to fix them all within some days, just needs some time.
Greetings ~Berni