PvP time-limit in gMS...

IF those items are easily obtainable then pvp will have a purpose. But if it turns out to be like dojo which requires a ridiculous amount of time and effort dont expect everyone to be on the pvp train.

We dont even have pvp yet! Why stress about this now

You mean the Proof of Ares needed to craft high level equips (like the Dark Angelic Ring)? Well the rates in KMS are 1 for 500 BP, 4 for 1500 BP, and 7 for 2500 BP. And if you do decently well in PvP (like 1st or 2nd place), expect around 100 BP per run, like in this SS from Spadow:



I'd say getting a lot of BP is a bit time-consuming, but it's not as much as Dojo. PvP is also pretty much more fun that Dojo.