I would think the 'shorter handlebar riser' is a No-No but there are certainly options to swop to a 'flatter' handlebar profile as long as they clear the fuel tank when on full lock.
You may indeed need to alter the rear shock but IMHO 'softening it' is NOT the way to do it (unless of course you did this to get the desired SAG correct?)
I have some lowering plates sitting on my garage shelf that you can try out for free, (I will even post them to you) they restrict the lean angle slightly but effectively lower the back end by 30mm. Combine this with letting the forks up through the yokes by about 15mm and you will feel much more in control when paddling the bike around.
I'm 5'7" tall and went back to normal ride height and a lowered seat and manage this way as I couldn't live with occasionally 'grounding out' on a bumpy bend at speed, my Sphincter was complaining too much
Good luck on getting it sorted to 'your' satisfaction