Hi, finally I was successful with your proposal - I have no clue why it worked, before I tried it several times, but didn't work... I was very close to a bricked phone in between ... Now I'm happy!! And YES full screen gestures working as expectedYou might need to wipe internal storage as well. No promises.
And NO, Corporate Accounts (MS Exchange) don't work, except you use GMail. Because GMail provide MS Exchange accessibility ... But than you have to rely on GMail...