They have had shooters on the HP committee. Issue is its very tribal with some only having experience in their area and then people sitting on it for year. So what you ended up with was only a couple shooters on the committee who know about FClass, so the others well I don't give a shit so stuff wouldn't get done. Same with other disciplines. This is what happens when the board is populated be specialists who are on their because of their outstanding shooting ability. Not saying all they're have been some people on there who are very well rounded. For that committee or an organizations committee like that to function you need people who are match director types who see both sides (sling/fclass) and it needs to be open. The HP Chairman hasn't done us any favors as he is just concerned about keeping his position and not speaking up against the NRA President because (his words) he'd lose his position, better to captain the Titanic and rid it down than speak up and maybe get the course changed. This is along with the NRA still holding on to people and not getting new blood in (OP is another example). The issue is their suggestions (HP Committee) have to get approved by the paid employees and the NRA board itself. So yes Tom Seilck, Karl Malone, etc. with all their HP and FClass experience vote to approve the changes it is a VERY lethargic process.
I don't blame the F-Class shooters at all for wanting out of that mess and being able to do their own thing. For years at the Committee level they were treated as the bastard step children and at matches and on national teams, some former Bald Eagle members were notoriously bad for doing this. You have people wearing Bull Shit shirts (one being a guy who runs the NRA Nationals and matches at a range down south) if it were easy it would be F-Class which is total crap and people who are downright nasty and negative to FClass. Then those same people who do this they wonder why people (F-Class) are on edge. So this caused the divide. The blame is not just on sling on the fclass side stuff has been allowed to get away from the original intent and it has turned into almost benchrest (never the intent) so it is hard for them to operate under HP match formats such as time limits, clearing the line etc. They allowed their rules to change and get away from the initial intent so they could shoot better score etc.
But the issue you potentially have in dividing is this. Say a club has 4 days a month of prone/fclass shooting. With being separate and their own rulebook there could be enough change that you can no longer run them together. So now instead of everyone getting 4 days a month you now have 2 days for fclass and 2 days for sling. Based on everyones declining numbers splitting like that may not be cost effective, especially given the increased costs we are seeing and just declining numbers in general, and so now clubs may be losing money on rental fees or their general membership wondering why the rifle range or shot gun range is closed for 10 people to shoot a rifle match. This goes back to the central problem decisions are made in certain areas and not looking at how it affects the whole sport at large.
I'd type more but I have to get ready for work.
