So reading the release notes, the pylons seem like a cool new feature, one thing I kind of dislike is the guarding monsters just like the various resource deposits. It seems like this mechanic is getting over used a bit. It makes sense for the resource deposits because I imagine they aren't onside buildings but for pylons, I think it would be could if they had a slightly different mechanic.
I think it would be cool it the pylons were buildings you could enter and they had a number of rooms inside of them that were generator rooms which had generators in them. These rooms would be blocked by bosses, a la switch rooms/gem veins/etc..., and each pylon would have a number of generator rooms. Perhaps for an added challenge, each of these boss rooms could have more than one boss in them or a miniboss and X number of micro bosses.
Yes, perhaps this would be better on mantis, but for some reason it makes sense to me to post here. I'll put it on mantis if it seems like a good idea to people.