My opinion:
I'm not completely against it, because it can't hurt. It's worth the investment. Jagex profits. Oldscapers get their game back. And those who think EoC is for the better will continue playing on their side. Besides, I think most if not everyone who wanted Oldscape back quit and aren't playing EoC; We won't notice a different in change in the current game. Like Damage Incorporated.
If Jagex wants to open this up for those server and oldscape fans and let them have their fun, so be it. It'll be like the RS Classic servers. I can go back and forth and debate on the tons of pros and cons, but one thing sums it up for me:
Anything that doesn't evolve and adapt is going to die out. Jagex won't be releasing any updates for the game. Theoretically, people who play 2007 will eventually get tired of the game because it's a static game.
In reality, I'm not worried about 2007scape becoming more popular, because it's only good for one thing - PKing. I want to enjoy other things and new content. That was then, and this is now. I'm done with 2007 content. I'm fine sitting out with in CWA, PK what's left in the wilderness, white portal, etc., and wait until Jagex revitalizes the wilderness. They've addressed it, they've specifically responded to us, and willing we'll "open our communication channels" with them and tell them how we want it. If they listened to bringing back the old game they should listen to the loyal, paying, and knowledgeable PKing community to change the new game for the future.
This is a positive thing. It's a win-win for all parties. Hypothetically, if this game becomes more successful than current scape (and we'll say by player count for sake), then that means Jagex really f**ked up. Jagex could only do one thing - fix the current game to make it successful like 2007.