In the end this is a new movement. Nothing in the various things that have been done here haven't been done before in other movements, but sometimes the sum of those changes can create issues. There are jo guarantees, and movements go through updates all the time for issues that crop up, and that applies to any brand. Omega is still updating movements that haven't been made in decades to address things that crop up...
There are no guarantees with a new movement, no matter who the maker is. Look at the date issue happening on the Tudor GMT watches.
If you want to go with a more proven movements, the 1861 would be it. If you are willing to live with some risk, then the 2861 might be your choice. But there are no regulations requiring a certain longevity from a watch movement, so although companies do some testing before they are released, the watch buying public largely ends up being the beta testers...
Cheers, Al