You can give your feedback on this discussion for Execution Maps(right now Canal) 
I personaly think that Canal is okay but for this game mode maps should be bigger,better to camp and not fast-action,because I have played Search and destroy in COD a lot and it isnt fast-action,more like camping and passive(comparing because they are pretty much the same) and I like it more than Dirty Bomb Execution,I know its just beta right now but just some advice for future maps 
Execution Maps
mindfulFlow
(mindfulFlow)
#1
Mr-Penguin
(Mr-Penguin)
#2
COD generally seems to have smaller maps then DB. I guess future Execution maps could be a little bit bigger, but theyโre fine as is.