I've made four characters with the new rules and only one hit the original CT skill limit (INT + EDU)
and those were four terms characters with two or three level-2 skills and plenty of level-1 skills. Most of them had a lot room to grow using the original rule. 3x(INT + EDU) is a lot but it seems unlikely to happen at most tables - after all, if the PCs do it, so will the NPCs. Or they should.
Personally I like the 2x(INT + EDU) suggested on another thread. But perhaps Matt & co have something planned for later where 3x will come into play...
On a related note I think level-0 skills should count as 0.5 each toward the PC's skill limit, including home world and background skills.