Honestly, while I agree (very much, in fact) with the notion of redressing ID imbalance, I doubt you're going to really be able to get a unanimous (or even close, really) agreement as to what correct ID reworking would involve. If you feel impassioned about this, send your own letter (I say this as someone who has done so in the past, regarding Exile and Harbinger). Heck, I might send my own.
As @hhooo states, HB:EtF is really the biggest issue, in terms of warping ID design. It's ability is simply so versatile and powerful that it really is basically impossible for new HB IDs to actually serve as reasonable alternatives without simply resorting to purple power creep (which would be far worse). That being said, as Niles further points out, there are problems on the Runner side (personally, I think a strong argument could be made for nerfing both Kate and Noise), that if they weren't addressed as well would result in major sad times for HB.
Anyhow, my personal nerfs of choice (in the interest of increasing ID diversity):
HB:EtF - "The first time you install a card in a server each turn, gain 1 credit.
Near-Earth Hub - Influence lowered to 15.
Kate - Lower the install cost of the first program you install each turn.
(Originally, I had this as only hardware instead, because Digital Tinker, but I think program might be better)
Noise - The first time you install a virus program each turn, the Corp trashes the top card of R&D.
The reality is, even with the aforementioned nerfs, some IDs that suck are still going to suck, irrespective of the former kings and queens having their thrones be shaken a little. Designers make mistakes and sometimes efforts spent trying to rectify them would be better spent simply learning from their mistakes and trying to improve.