I didn't think Secret Invasion sucked. It was just ok as a Marvel/Disney series. I enjoyed a good bit of it and has it's moments. I'm hoping they'll do something good with Secret Wars. We'll see I suppose.
Outside of losing Chadwick, the collision of Secret Invasion and The Marvels is/was the biggest reason for Marvel to pivot and slowdown
Feige wasn’t able to oversee both and both suffered from lack of vision and connectivity