So much to comment on here, but luckily comments are the lifeblood of internet chat boards ...
(1) There's no quantifiable way I've found (though many other hockey fans think & claim they have) for direct comparisons among the sub-AHL level hockey leagues. Team records are greatly influenced by their regular levels of intra-league competition, as are spectator perspectives of the quality of a team or even a single player in a given league (the latter with an occasional but rare exception). These conditions make inter-league comparisons fruitless, and tend to feed heated debates over one fan's favorite league being "at least as good as" another fan's favorite.
(2) But on the premise of inevitable standard categorizations of the levels of NA minor pro hockey, I'd respectfully suggest you reconsider your characterization of the current FPHL as "a high single A minor league." Or at a minimum I'd like to know which league you consider to represent
LOW single A hockey.
(3) Over my last 12 seasons of following minor pro hockey (mostly by traveling as I've only had one "home team" to root for & they lasted just one miserable season), I've slowly grown to appreciate the FHL/FPHL as just another color on the multi-colored palette (and palate) of the North American game. It's not elegant, and it's sometimes flaky, but it can be entertaining when it takes itself seriously.