Read it and unless I'm missing something it doesn't seem to say anything of note other than 'Trump went to Russia quite a few times' and Manafort meeting with Russian businessmen.
Assuming Simpson was truthful - and based on the transcript, I saw no reason to suspect he's lying - then the "Steele dossier" was not the basis for beginning an investigation into Trump-Russia connections. For those paying attention, the transcript goes a far way to undermine the talking points by GOP leaders who are seeking to attack the likes of Steele, Fusion GPS, etc. Of course, the whole point of that exercise is to make it seem like the basis for the Russia investigation is fraudulent but it pre-dates the dossier and is based on intelligence gather by the US and its allies.
That's why Feinstein released it, not as definitive proof that there are criminal Trump-Russia connections but rather to cut off the growing lies by GOP pols regarding the testimony itself and show that Steele and Fusion
did have reason to be concerned by Team Trump's financial dealings, behavior, and lies. That concern reflected the feelings of the broader intelligence community, I think that much is clear.
In the end, it may just be that there was no criminal efforts by Team Trump to get Russia's help in the election (though I'd say the emails and testimony by Don Jr, Papadapolous, Carter Page, etc show otherwise). It may just be that Trump is a weird guy or that his ego didn't want it known that he wasn't as rich as he was. That's entirely possible with him. But his behavior suggests he has more to hide and that could be any number of things (money laundering, other financial crimes, pee tapes, etc). IF he went as far as obstructing justice when firing people, if he told people to lie, lying himself, etc, then you have to wonder why.