Some rules tweaks I've implemented in my game to generally make options more balanced and/or useful if they're underpowered. Comments and suggestions are welcome.

*If you have a duplicate Professional Aptitude, you can take a different defensive Professional Aptitude or one appropriate for your concept.

*Since Pushing has been made relatively useless, I've changed it based on whether the psyker is sanctioned or not. The former don't modify their chances for Psychic Phenomena (and thus take the penalty), while the later don't take the penalty, but suffer the increased chance for Psychic Phenomena.

*Cover-Up: Instead of eating Influence, it requires an Influence test to gain 1d10 Subtlety once per game session. Contact Network can be used with this talent.

*Warp Conduit: Sanctioned Psykers can spend a Fate point to increase their Psy Rating by 1 without additional penalty. Unsanctioned Psykers use the rules as listed.

I like the idea of your Pushing changes and I might try them out in the future, though I fear they make unsanctioned psykers very powerful. It makes sense that sanctioned psykers have a hard time unleashing the full power of the Warp, while unsanctioned ones can boost their abilities by letting the Warp rush into realspace. But remember that unsanctioned psykers can increase their psy rating by up to four when pushing; a lowly Warp-caller could potentially increase their PR to six, while a Warp-priest could use Psy-drain and pushing to reach a horrifying PR nine with no penalty to focus power tests! A Psychic Shriek of that strength has a better-than-average chance of hitting and deals 1d10+20 explosive damage, obliterating all but the beefiest PCs.

Also, under those proposed rules there's no reason for an unsanctioned psyker to ever push less than the full four PR. Maybe they'd take a +10 bonus to their Psychic Phenomena roll for each level they push.

IMHO, unsactioned psykers should have a higher power level that's quite a bit riskier than sanctioned psykers. Along that vien, adding a +10 penalty to their Psychic Penhomena roll per point of push would fit rather nicely.