Every time i've played this map, last has been an absolute slog to push. I genuinely think it might be a little too complex for pubs as the amount of complex height variations and the flanks make it difficult to coordinate a push on.
That said, i've otherwise had a lot of fun on Extinction. I would strongly suggest doing a grime artpass to make everything significantly dirtier, especially the first choke building. It's rather jarring to wander into this super clean wooden building on an active excavation site.