This is the classy and PROPER way to do it, IMO. If you aren't 100% sure and want to keep taking visits and have an open mind. Then de-commit publicly and let the world know where you stand honestly and above board.
I am sick of all the kids that claim they are 100% committed but keep taking visits. That is just "holding a spot until something better comes along" - which is not the stand-up honorable way.
Coaches shouldn't offer unless it is commitable and un-retractable ( except in maybe rare circumstances where a kid stops performing in the classroom like he was or commits a felony or something dramatic ). Yes, that means stringing kids along more and possibly losing planBs more often - but IMO that is part of the JOB and why they get paid millions. Lying to kids about offer/OFFER and screwing them over is a bad example to set and since they are faculty IMO it is both dishonest and immoral and corrupt to play such games with 17 and 18 year old kids - as 40,50,60 year old men!
I don't mind late offers or trying to flip kids, but if it is at the expense of others ( reneging on committed kids without major extenuating circumstances ) it is downright sleazy and plain wrong, IMO. Unethical and unprofessional behavior by coaches should not be dismissed as some kind of right. Cheating kids is no better than cheating the NCAA rules, IMO it is actually much worse. What Tress did was trivial BS, IOW. Coaches that pull the rug out on a kid's future by lying and cheating to get a small edge on the 85 limit - is much more egregious.