And again, this is a complete assumption on your part. I'm not saying it won't or can't happen, just that since we're not privy to the game code and inner workings of it, or Funzio's future plans for new maps, to make such a sure statement as you did makes no sense. You don't know, just as the rest of us don't, so outright calling someone wrong for something you have no idea about is just in poor taste, no offense.
I really do not think that they will bring in gem only maps as this would immediately alienate the majority of their player base who do not purchase gems.
Once that happens the game will stagnate as people quit and word of mouth referrals will disappear.
Ave Atque Vale