I learned a lot more than what I previously knew and I think any sane person who watched or read transcripts would see that Trump abused his power. No question about it.
It also showed me that Republicans spent the vast majority of their time trying to deflect and whine about the process. They just cannot defend the indefensible.
I personally think that if Trump is not impeached, voters that truly care about our democracy will not vote for him.
I agree with OP and Millgirl, go ahead and investigate the Bidens, Obama, whoever... through the proper channels and if they have done wrong, prove it, and let them face the consequences.