plenty of ways to bait the grab out.
- you can dash dance, get close, then get back out, run back in after they miss the grab
- projectile spam/punish for missing
- tomahawk grab them first
- run in, go for a roll
- empty hop just out of range
- use safe on shield aerials
- dash attack combo/strings
- spot dodge
- cross up bair
- platform camp
- ledge camp
- hold shield til they run in, then aerial out and start a string
- wobble out of it before they throw
My point is, that there are plenty of things to do. Smash is all about adapting, you've done the first part (identify the problem/habit), now you need to commit on the second (react to the habit).
You already know they're gonna grab, that's super valuable info. But most likely, once they get punished for the grab attempt a few times, they may stop doing it and you're back to adapting to their new play style.