It depends on the individual. From what I remember, Hal and Guy tend to use simpler constructs, while Jon and Kyle use more complex ones due to their backgrounds. (Jon was an architect, Kyle an artist)
It seems like they're cutting ties anyway, they just might have Jackman stay as Wolvie. After all, neither Magneto or Xavier are old enough to be anywhere near what they looked like when they went to visit jean grey the first time. Also Cerebro is built differently.
Cerebro was also destroyed by the whirlwind guy so it has to be rebuilt. Also, they met Jean in the late 70s early 80s, so theres still time for them to age. They've said it is a prequel rather than a reboot. I think a reboot would have been a better choice.