Raptors are neglected big way,
for example "The USAF is also moving forward with plans to equip Raptor pilots with a helmet-mounted display system by 2020 ..." inside CombatAircraft link above,
while I've read somewhere they had HMDs down in Angola around 1980 (against South Africa), LOL now but it's not funny
Raptor maintenance is likely the best in the world, so NO they are not neglected! and while I get your point on HMSD,, that's like deciding if you're going to mount a scope or a red dot sight on your rifle.
the Raptor is still using a "scope", the F-35 has a "red dot", the new teck brings several incredible advantages, most particularly the "look and shoot, of the high off bore sight missile shot" and "situational awareness" brought by "sensor fusion"...
The F-35 is the "electric jet", nothing else quite like it in the world, you can "plug and play" anything you want, the F-22 has earlier electronic hardware and soft-ware, and it is much more difficult to plug a new piece of hardware, like an HMSD into that system and have it function correctly and reliably.
With the Obama administration and their horrible damage to the military, think "sequestration", or even "shutting down the F-22 line", they didn't give a "rats ass" whether the Raptor had a HMSD or not?? its very difficult to totally assess, much less "undo" the damage the former administration did to the US military... so its no stretch to say our Nation's defense was neglected as a whole?
however, I wouldn't want to find myself in front an F-22, there is nothing with wings on this planet that I would ride against an F-22, NOTHING!