It's not that it's supposed to be a drop-in replacement that's hyper optimized or anything, but more of just something that's lightweight and not stupid in general.
For you I will share the ultimate secret. You can get the good stuff at any quicky-mart:
If you can turn a cheap last-gen smartphone into a full-blown OUYA-like console with a controller that outputs to a TV and will run emulators like SNES, PSX, etc you will be a god amongst nerds.
I'm not really a fan of lua or dynamically-typed languages, and I wasn't really digging the angelscript for all the stuff I needed to do... so c# scripting at that point was a no brainer, really. The downside is that it is very time-consuming to bind everything properly--especially when you want quick proxy or place-holders for thing that aren't done yet.