Not asking for them to provide the numbers themselves. When you make a post asking for an item to be changed your argument must be specific and take the items around that item into account. Everyone in the debate has access to the numbers, the difference is I think they are correct or near correct while they don't. The onus is on the player wanting a change to show the the devs they are not correct and that takes more than general statements or complaining.
So after looking through the various +h2h and gloves in the game, I'm seeing two issues with the current situation.
First, it's trivially easy for a fresh 65 monk or beastlord to obtain enough +h2h to wind up with fists that are 18/18 +2 ele damage, or 19/18 if the specialization is causing better fist ratios like you say it might. I twinked out a level 1 beastlord yesterday, and for ~2000pp capped his +h2h at +25 and got gloves with +2 fire damage. There are better boe gloves available as well that have +3 damage and/or a proc, I simply bought cheap ones with no rec level. This is problematic because it makes pretty much every weapon inferior to bare fists while progressing through the raid tiers, and it also causes monk/beastlord DPS to scale completely differently than any other class (plateau early on and end up being left behind by other classes at the high end).
Also, the glove progression is a mess now. It starts off alright... there are numerous BOE gloves with +2 or +3 ele damage or some +h2h, some with procs and some without. But when you look at where it goes from there, you can see the problem:
Tier 6: Fistwraps of the Chosen. +15 h2h, 2 fire damage, 1.9% proc of 150dd
Tier 9: Handwraps of Twisted Souls. +10 h2h, 6 disease damage, 4.5% proc of 400dd
Tier 9: Silence. +10 h2h, 6 magic damage, 6% proc of 125dd
Tier 10: Ule's Conception. +10 h2h, 6 fire damage, 10% proc of 27 AOE
Tier 13: The Matron's Grasp. +5 h2h, 6 fire damage, 2.9% proc of 640dd
So, currently +h2h on gloves actually decreases as you advance in SoD. On top of that, the number of relatively on-tier armor pieces with +h2h to use also decrease as you get to higher tiers.
Tier 9 gloves currently perform better than Tier 13 gloves in terms of DPS.
I'd recommend two things. Put Blazewind gloves back where they should be- Every other dps class receives enormous dps increases between tiers 9 and 13. And do something about the way +h2h works now. Either completely revamp the availability of the +h2h mod or change it to scale differently.