[2019] Decay timers are getting ridiculous!

This looks like a bug with the training dummy in particular, and there are likely some other structural pieces with low decay timers that will need to be tweaked. I have spoken to the design team about syncing up the decay so that there is consistency across the board and it's something they're amenable to though it might be a bit of time before it comes into place.

As for structure spam in general, that's a much more difficult issue to deal with and we are actively discussing and looking into solutions, but there are no immediate changes on the horizon as it's something we'd like to plan out more thoroughly.