[BAILOPAN]

You need to keep track of whether players are in game or not. That's it. For a seasoned coder that is trivial; for someone unfamiliar with the HL2SDK or SourceHook, it is just a bit of research (and there are plenty of open source plugins with examples).

There is no reason to be "stuck with" EventScripts because even using an alternative like SourceMod is faster.

I don't see how that's not good news! You get multiple alternatives, all much faster with varying degrees of flexible complexity.