What was the matter with the old system? I suppose you could rake in massive amounts of XP by sending one member of you squad to each base being capped on a continent, but I never saw this happening. The most a squad I was in ever split up was to hit 2 bases at once. And even if someone did do this, what harm would it do? This isn't DAoC, XP doesn't make you more deadly, just a more specilized killer.
I liked the old system, and I hope they will go back to it, or at least something like it. A new XP system this close to release, nothing good can come from this.