I remember a long time ago (I think it was Duke?) made an addon with a bunch of weird stuff, including a feature where when using your knife you could "free-climb", spiderman-style...
What I wonder is if the improvements of RT are more significant than the bugs, that is, what % of the shots hit where they're aimed and miss what they're not aimed at, with and without RT? If RT improves that %, it's worth using in my books
Something like, say, DTAS with random team spawn and some kind of compass version that will point you towards the objective, is absolutely necessary even for just LAN play (btw can you configure DTAS for single-player-cap so that it works in smaller matches?).
Weapons really depend on how well they were done. For example, if the M60 actually feels like an M60 and the bulk is set appropriately, then it's fine, otherwise I'd rather not use it myself.
I would just test all of those myself, but I probably won't find all the bugs and/or unrealistic features by myself, and I don't even know what's available and where to get its latest version.