Would you like to choose the map you'll play?

How about an outright no option? Otherwise this poll is heavily biased leaning toward your idea, despite it being a horrible one. Don't mind me, I'm just blind. People don't realize that as an Ace main, wearing sunglasses all the time in the dark can be kinda rough sometimes.

Dead by daylight is an asymmetric title, you don't CHOOSE anything about it, that's part of what makes it fun (and frustrating) and either way it's a core fundamental aspect of dead by daylight as a title. It's one of the core characteristics that make Dead by daylight dead by daylight, the idea that no match should ever be the same as your last with every survivor being different, every killer being different, the realm being different, the location within that realm being different, the perks being used, the offerings at play, etc. so on and so forth.

By controlling the map selection you control what parts of the asymmetry you want to see and what parts you don't, and that's quite simply not an option and something the devs would never go for, because you essentially strip away part of DBD's core philosophy.

Even if you limited the choice to realms guess what, some realms only have 1 map location at all, namely the licensed realms like Haddonfield, The Game, Hawkin's Lab, Midwhich, etc. So by limiting the choice to realms you're still technically picking and banning maps. Sure these maps aren't the most popular, but the answer is to fix those maps and make them enjoyable to play on not a pick and ban system to prevent ever going to them.

Not to mention pick and ban systems in general are for games that are completely unlike Dead By Daylight by basic principle. In Dead By Daylight, you don't control a single aspect of the game beyond your own character and a slight influence through offerings. Games that have pick and ban systems are meticulously competitively and intensely balanced to the smallest most minute detail, like League of Legends, Rainbow Six Siege, etc. While I would argue Dead By Daylight is competitive and has been heading towards competitive viability over casual mechanics for quite some time, these games quite literally are not Dead By Daylight in basic and fundamental themes and principles.

This is not something I would ever want to see come to Dead By Daylight in a million years.

this would be good for casual play, not competitive where it is random

Voting for the maps for each player in lobby would be better, no ban just like GTA online missions.

Ultimately I think the chosen maps needs a huge rework. Im absolutely tired of playing match after match at the same damn map, always auto haven or McMillan. There's so many other choices but it seems to be the only ones played. It being said there's like 5 realms for each of those should have its probability percent lowered especially it seems I play the same realms anyways. Doesn't affect my skill but it makes me not wanting to play just because you always know where you're going. Map offerings aren't super common and you shouldn't have to use it just to get to play a different map. Then there's always the bugs with offerings. If two are played, the one not chosen always gets burned anyways in my experience. Then there has been using an offering only to have it burned and the map chosen being auto haven anyways.

Maybe in other game modes

Survivors should not have choice in maps, period.

The best system would be for Killer to just be given the choice between 3-4 random maps, and that's it.

That way the Killer doesnt get completley screwed by RNG, but they also just cant pick whatever they want and get a god-tier map for their build every single time.

I dont think banning maps, but maybe a CoD or Halo scenario where you're given 2 or 3 options and everyone votes for their favourite of the bunch :)