I don't like the new map for nexus blitz
They made it much larger, with there being a whole cross section/jungle area between the two bottom lanes. Which drastically takes away from the close quarters of the old map. That feeling where even in the bot lane you always had to be wary of what was going on above.
This also takes away heavily from the top of the map as red buff no longer is there. Before there would be early fights around red at the top of the map, early jungle invades where the middle laners would come help - many fun fiestas ensued. Now no one stays or does anything in the top jungle because so much has to be focused on the bottom half (which it being a bigger map means it takes longer to get there so less time is spent wanting to be in the top half).
I loved the old map because the close quarters meant more fiesta which is much less now. (I also really hate the new dual event, but that's for another post)