Should I activate bronya's e2?

Just got her e2 and I'm conflicted... I've hardly heard anything good about it other than it causes a lot of speed tuning issues which worries me a bit.

Imma be real, I haven't used bronya that much since getting sunday, but I can still use her from time to time.

At face value it shouldn't be a massive problem because it leads towards her other eidolons such as e4 for follow up teams.

Thought?