I'll just say....
The first day I logged on (Tuesday I think it was) after this was implemented I saw more bases taken (on all sides) in the text buffer in 1.5 hours than I have in the past 2 YEARS....
So maybe it's too easy. That doesn't negate the fact that this is an IMPROVEMENT over the stalemates that have reigned in the arenas for so long. I haven't seen a map reset in lord knows how long, but now we'll have a real opportunity for that.
So, maybe bump it up to 60%, 70%, maybe 75%... Anything generating this much attack action, defense, action, and general action, it a good thing. I know base taking is not the only thing that goes on in here, but you have to admit it's one of the best ways to find a good fight!