In current beta rules, so far most of psychic powers feel like re-skin alternative weapons or combat devices. I think it would make the game better if there was more to psychic powers that would differentiate them from weapons in combat applications as well as provide interesting none combat applications (and very tempting as a lure for corruption).
As far as combat applications I realize that t the combat blaster psyker is an iconic role, but it seems like there can be more done to differentiate the psyker presents on the battle field from the mundane weapon users. As such, as another options to raw damage powers, I personally find more interesting effects that would shape the battlefields and environment. Something that would not be duplicated by regular means.
I am also very interested in psycking powers with none combat (or at least not only combat related) applications that would come in different power levels (would fit nicely with a tier structure for prerequisite requirements).
Warp effects: I would like the powers to have the thematically appropriate warp failure effects that simulate the kind of corruption a loose canon psyker can have on society. It would also be cool if such effects could target random civilians instead of always fall down immediately on area around psyker. Would be a interesting layer if warp failures effects could not be obviously traced to the psiker that caused them (as even he or she might not know) and would require investigation.
Here is an example of what are some of the effects that I am thinking about (note the following is meant to illustrate variety possibility and is meant to be used as an example of “balanced” powers in current power structure)
Befriend Animal:
Effect: X times Psy rating target animals becomes control by psyker for X times psy rating rounds. After this power duration ends the animals reaction toward psyker will be up to GM discretion.
Sustain: this power may be sustained being the above duration expires at the cost of 1 AP for each animal controlled this way.
Posible Warp failure: 1d10 animals within 10 mile radius become exposed to chaos influence and mutate.
Flavor text: The purge to find and cleanse the source of mutations lasted for almost 3 years, several hundred thousands of cattle has been burned, their pastures forever sanctified with sacred salt and three local towns marked as heretics and exterminated. It is still unclear what was the source of corruption, although local rumors talk about a rogue psyker discovered and send to black ships around the time the mutations stopped.