Activating effect half way through clip?

Hi, my name is Will and I am relatively new to FCPX.

I'm in the middle of an edit where I have a final clip with a rising ken burns pedestal and some titles. I wanted to add in a "gaussian" blur effect just when the second wave of titles appear.

Naturally, I thought of just splitting the clip at the starting point, but this skews with the ken burns tilt I originally had throughout. Since the ken burns requires (to the best of my knowledge) a brief moment for acceleration, it doesn't continue the same seamless pedestal motion I was hoping for between the split clip. It starts a new ken burns motion effect, even if the exit frame position and starting frame position between the two clips are in the correct coordinates. The need for acceleration for the effect ruins all fluidity.

So, back to my original point, is there a way to simply activate the blur effect halfway through a clip instead? OR, is there a way to modify the ken burns effect further across both clips for seamless motion?

Thanks for the time!