I equipped the demolition armour and now really miss the jump pack. But the demolisher armour was so much better statwise that my existing armour the choice was obvious. 

That troubles me with the weak passive trees so far, providing miniscule / small bonuses. I do like that stats come from achieves, which provides longevity and progress longer term.

Some variety in terms of skills on types of weapons might help. Say, Chainswords can have up to 2 skills, from a pool of 3 or 4? 

Combined with some kind of crafting and customization system, you could then perhaps choose / change a skill?