Hello. This is something that bugs me with most modules but Jeff in particular since it is pretty much the only top tier jet that doesn't have HMD.
This I feel pertains to people like me who don't/cannot use VR. Since head tracking solutions do not allow for rolling eye balls nor do monitors allow for peripheral vision, it is difficult to maintain awareness in Jeff while under pressure.
A basic HMD that shows altitude and speed at the very least, (no need to even model HMS, yet) is needed. I know that PAF isn't known to use it yet but Jeff is designed to work with many off-the-shelf solutions. I didn't really buy DCS: PAF Jeff. I bought DCS: Jeff. I don't really care if it doesn't match PAF exactly. PAF is to me more a livery than modelling constraint. I'd like to see Jeff modeled more to its potential.
Go Jeff!