The bulk update request #5019 is pending approval.

remove implication pride_colors (11013) -> lgbt_pride (11447)
remove alias lgbt_pride_colors (0) -> rainbow_pride_flag (1043)
remove implication rainbow_pride_colors (4005) -> pride_colors (11013)
remove implication asexual_pride_colors (371) -> pride_colors (11013)
remove implication bisexual_pride_colors (2059) -> pride_colors (11013)
remove implication lesbian_pride_colors (646) -> pride_colors (11013)
remove implication nonbinary_pride_colors (630) -> pride_colors (11013)
remove implication pansexual_pride_colors (1232) -> pride_colors (11013)
remove implication transgender_pride_colors (2626) -> pride_colors (11013)
remove implication rainbow_pride_flag (1043) -> pride_colors (11013)
remove implication demisexual_pride_colors (139) -> pride_colors (11013)
remove implication genderfluid_pride_colors (212) -> pride_colors (11013)
remove implication straight_ally_colors (27) -> pride_colors (11013)

Reason: This BUR won't touch the variety of flags that exist beyond distinctly LGBT+ ones, but is to set up for their already-existing presence under pride_colors (hopefully resubmitting pieces of bulk-declined threads is acceptable). pride_colors currently implies lgbt_pride, causing all pride flags to funnel into that tag regardless of type, while I propose freeing up the lgbt_pride_colors tag to fix that. This BUR just shifts all existing implications so that LGBT+ flags imply lgbt_pride_colors, which then implies both pride_colors and lgbt_pride seperately, while pride_colors no longer implies lgbt_pride

The new implications don't work in a BUR to an existing alias (removed in the BUR), so the rest is below

I thought the reasoning behind the rejection of your big BUR was a bit silly...
"these are getting out of hand" yes people have made a lot of niche flags but the flags and images depicting them still exist whether Rainbow Dash likes it or not. The whole point of your proposed umbrella tags is to keep the many flags contained for easy searching/blacklisting. I'd argue that they are currently out of hand and that setting them up in a proper tag tree fixes the problem. E621 has LOTS of very niche tags and that's what makes the tag system so incredibly thorough and useful for finding specific images.
"Established flags suffer" makes no sense to me, I'm not sure what that's even supposed to mean