The crossovers worked for me though, as there is a nice contrast between barry and ollie in how they view and do their jobs, much as between bats and supes!
That's a good analogy, it shows that the heroes come from different places mentally and I enjoyed the contrast.
The crossovers were a bit hit and miss. The first one was terrible; how do you call a guy "Rainbow Raider" when he only shows one color? Shouldn't he have shown yellow for fear, causing a panic at the bank, and then red for rage to incite Barry? At least then you've got two colors there. And you had those black and white paintings in his apartment, but I don't think they ever mentioned Bivlo is color blind. I just thought they marginalized a good character for the sake of the crossover gimmick.
The second crossover was much better. Captain Boomerang was handled better. But the third near the finale was equal parts awesome and meh to me. The hero team up to take down Reverse Flash seemed unnecessary. Again, it felt like a gimmick.