Hello and welcome to the forums.
There's a way of seeing your own armour/health by pressing Tab (default). You can also see your team mates health/armour, but that's about it.
The damage model is not wonky (God forbid you from saying that, VC will
rage...); in fact, it's fairly accurate representing what was in the original, as well as headshots. An headshot in the original wouldn't kill you instantly (dependent on the weapon and health, of course, but a Klobb headshot only takes a chunk out of your health). This is also dependent on the net code, as Wake mentioned.
Your main gripes seem to centre in MWGG mode, which can be an annoyance if not properly played or not on the proper map. I do agree with your ideas of a penalty for the GG user; one thing was when you and your three friends were together and you could see where the GG user was, but the internet is a different things.
The knife as default starting weapon is a problem of the servers. They have to set it so you start with Slappers (the knife does more damage though, if I'm not mistaken).
I'm also glad to hear your criticism/ideas. It's always nice to have feedback like this. It helps us improve.
One thing:
don't offer to be a playtester. In fact, if we look at it well, everyone that plays the mod is a playtester, since this is still a beta

.
Looking forward to see you on the servers!