Abrogate object makes you an instant expert locksmith. Just touch the door and fwoop you can pass. Going up to large objects is going to be a nightmare to create a campaign experience around. Find a brick wall? A number of uses equal to your proficiency bonus means you'll be able to remove a bunch of blocks, then knock the wall out.
Void existence makes you an ultra powerful resurrector. On the verge of a TPK? Touch the enemy and insta uno-reverse. Combine this with suppressed presence and incorporeal body and you can pretty much guarantee access to the killer.
Incorporeal body/spirit are neat mechanics though.