Not all of the new maps are bad. There are lots of maps with potential in my opinion. The problem is more, that mappers aren't interested, are too lazy or what ever to improve their maps (also experienced mapper), because the unfinished maps are playable on match servers anyway and we don't have an official maplist at the moment.
I mention that for years. We need a general change for the map(-ping) part of the game to increase the quality of the current and new maps. Beta only playable on beta servers, official maplist, map signature, etc. are just a few possibilities. The mapping committee might help to implement stuff like this, but unfortunately it has not enough influence and everything needs jitspoe's ok and help.