The deal is done. It doesn't matter if you think it will be good, or bad.
But, take a look at the difference between acquisition policies between the two companies.
On the one hand, you have one which purchased companies and simply had no transition plan. Nothing in place before change-in-control. Allowed the accquisitions to whine and keep all their internal tooling. In fact, some of the acquisitions were so whiney, they ended up forcing the acquiring company to let them continue to use their choice of software, that was functionally covered by existing tools.
Truly a wohs-tihs if there ever was one.
Now, the acquiring company has done their homework. They're forcing the aquiree to switch. They seemingly have planned this out. They have documentation. Instructions for activities that need to be completed. Hundreds of pages of documentation all in one place.
A transition of this size will have hiccups, but it's very well thought out so far.
My first impression:
The difference in management by able adults on the one hand.
On the other hand, management by people who got their jobs through community connections, and certainly not on qualifications or ability.