The Thinker still seems to need technology in order to move between dimensions, which is a weakness that could be exploited by Team Flash if he’s not able to absorb Gauss’ powers.
Edwin Gauss on The Flash will obviously have some key differences from his comic counterpart, as he’ll gain his abilities as a metahuman rather than require a suit in order to travel between dimensions.
His powers could make him a major target for The Thinker, who Team Flash realized was hiding his lair in a pocket dimension, allowing him to pop out at Barry and Co. seemingly out of nowhere.
Gauss could become a big target for The Thinker, or perhaps even an ally.