Something worth a try with an all roads tyre.
I had added wider bars while my bike was still on the standard Tyre and noticed the greater leverage made the bike react in a turn faster. To fast for my liking. Once I put the Avons on things cam back to normal somewhat but road input was increased back up the bike and also vibes . I turned up my own heavier bar end weights about half again as heavy as the stick ones and this gave me the smooth feel of the original bike in stock trim.
So maybe a play with heavier bar end weights might help.