the combat is... crap. and it will always be ... crap.
Far out in the Pacific Ocean there is a small island where the inhabitants worship the very concept of wrongness. In the center of the island's village, high on a plinth and visible for a mile in any direction, is a statue of you.
If he's referring to the melee part of combat, put my statue next to his.
I would love to have some variety there, quick lunges, sideswings, blocking, slamming downside (if you played skyrim you know that I mean).
Just "hit hard or hit normal" feels a bit meh when you imagine to rather being able to smash/ragdoll Zeds into a specific direction (e.g. over the edge of a roof) if you choose the right attack type.
So if you also like games (tekken or alike) it will suck for you.
Hopefully that's getting some love.
The gunning part of combat is already big fun.
The building/creative part is absolutely great.
Freedom/variety of choice how you spend your time / aspects to focus on is the most outstanding aspect in the game I think,
which is already well balanced.
Graphics is a point I don't really care about.
Yes it will never reach same visual greatness as many other today's games (voxel based game...hardware and game-engines that could manage that simply don't yet exist for "mainstream" desktop PCs). I have it running on my 10year old CPU (i52500K) and a R9 390, with some mid-low settings, (reaching around 70fps at 1920x1080), and I love playing it.
So my opinion:
Buy it, play it, and be part of the community to share the things you like and you don't like.
What was already said, you will at least be heard.
The devs are around here so often that I sometimes think the game would already have gone gold years ago,
if they focused on coding not chatting

.
Seriously: it's brilliant and an outstanding example of the whole "early access" concept!