I'm not sure of any other mods like this one, but I think you should follow @Jay0Jantern. Jay0Jantern and some other developers should start making a spiritual successor to this project. So if you want more content like this, that spiritual successor is probably your best bet.

aight thanks, man

There also seem to be more singular map expansions that are popping up. Search up expanded maps or edited maps. You can use those with HL2 Additions or Beta Content if you're okay with that specific map only having the additions of that one edit.

Re-edited maps by monki he makes really good stuff currently he's edited the point insertion, red letter day, water hazard, anti-citizen 1 and follow freeman chapters. Note that all these are separate mods