With all due respect, the Big Four and 7-10 are not any more special than any other split in bowling. Way back when, ABC/WIBC decided that those splits would be eligible for awards, most likely because of the difficulty involved in trying to convert them. But what about the 5-7-10, 2-8-10, or 3-7-9? Are these splits not as difficult, if not more difficult, to convert than either the Big Four or the 7-10? Perhaps USBC should create a new award for those as well?
The point is someone, somewhere, some time ago decided these splits deserved special recognition. Now, someone, somewhere has decided these splits no longer deserve an award. Yet this does not diminish the recognition of the accomplishment of converting the split.
As for the accomplishment of the 6-7-10...not a big deal to me, at least no bigger than any other split conversion...looks the same on the scoreboard. That said, as a league secretary/treasurer, I've had plenty of bowlers come up and ask if they get an award for that exact conversion. They often cannot believe they don't get something for it. Again, they assume that since it has a greater difficulty they should get something.
That is the problem that ABC/WIBC created, and USBC now has to fix. Bowlers now believe they should received something just because THEY think it is hard enough. Any split conversion (or other "special" achievement) carries a level of accomplishment with it, but I'm afraid such accomplishment does not make it award-worthy.