Excell is a standard, editing parameters with Excell will be easy and it could be the best way to Export/Import them.
All 3 of these Product ideas are similar and each should be voted for to increase chance of implementation:
(clicking link does not work so you need to copy/paste into browser address bar)
It would also be nice if the entire table size could be scaled bigger or smaller (text boundaries and all).
Keeping this open for voting; it is related to, but not the same as Add Excel functionality to Tables in Creo Drawings