Re: Hardcore is not possible in 2042 - constructive criticism to fix this.
Not sure what you mean about "very little support" for Portal. The game just launched and they are far from tweaking / adding to it. We just got 7 more maps opened up for Portal this last Friday, some tweaks to AI, additions to the Logic Editor, etc. I agree it has potential and with the community continuing to let devs know about features they want, we could see those things come to fruition in the future.
I agree with a lot of the points you have listed and I hope to see an expansion on the options to include some of these. As far as creating "hardcore" experiences though, I guess that's defined differently with everyone as I find I can still tailor setting to make the game feel much more hardcore than in the normal modes.
With the vehicles, I use the option where you have to spawn them from the menu. There always seem to be some there for the real players to take when needed.
I'm sure you've seen what Karmakut has been doing to create a more "miilsim" experience with Portal but I have taken some of his settings to help tweak my own.
btw, if you don't know already, Justin Wiebe from Ripple Effect has been very active on Twitter interfacing with the community and Tweeting about status updates on existing issues (e.g. XP/progression) in relation to Portal. If you're not already, I would encourage you to follow here on there and even shoot some feedback his way. You never know and it's not every day we as players get the chance to have this kind of exposure with someone on the inside.