Not everything will get fixed in one update. 5 min countdown for healing powder is a bug and will be fixed.
Alloys for Flamers - well, Alloys expense is diminished from before wipe, so having an Alloy in a recipe now is not as big a deal as before. Having said that, I can't remember if I lowered the requirements for them ... vaguely remember making GP and MP 40% Science and Alloys 60% - is this on the server at the moment?
As for small guns requiring high quality parts, it should always have been like this. If you want to craft the good stuff you're going to have to get out and get your hands dirty. For the safe option, theres always level 0 and 1 items.
As for 10mm SMG and Grease gun switching round, Grease is worse than a 10mm SMG, so I switched it - which then allowed the .45 cal ammo type to be the cheap option SMG.