With the recent addition of Cache the fantasy of the map changed which I really like. But I honestly wish Valve would have done that to every single map in the pool. Not necessarily change the layout but give another fantasy/look to it.
I myself find it a bit boring that some maps are just straight up ports from CSGO. Mirage is Mirage and Dust2 is Dust2. But something like Inferno, Cache and Train get nice looking overhauls which in turn creates this weird mish mash of old and new maps in the pool.
I also think they should have added more CT/T Factions, Voice Lines, Different weapon sounds and slightly different reload animations. I know CS2 comes off the heels of CSGO and it's supposed to be more of a remaster, but I hate that it feels more like a poor imitation of CS:GO then a standalone title.
Having jumped from CS 1.6, CSS to CSGO felt so unreal. The hand models, reworked maps, voices, sounds, factions.. etc. I simply loved the game's aesthetic... Which CS2 lacks in. It's crazy that I feel like CS:CZ added more flavour to CS 1.6 then what CS2 did to CSGO.
I think the main problem is that CSGO was a game for casual people that happened to be viable for pro play rather then CS2 which is shoehorned to be pro play. Where as CSGO's competition back then were other FPS games such as CoD Modern Warfare and Battlefield (Which you can feel in CS:GO's darker tone) CS2 competes with Valorant nowadays, which changes the way they approach CS2.