Hello Middle River,
About ten months ago, I purchased the Zeiss 8x32SF to replace my 8x32FL. Yes, it is larger than the FL but the ergonomics are fine. My only issue with the SF was blackouts, which I attributed to looking through my the dividing line of my bifocal glasses, but I quickly learned how to position the binocular and my eyes. YMMV, so always try binoculars and purchase from a vendor with a good returns policy.
In any case, the FL is an excellent glass and upgrading may not be worth your while.
Happy bird watching,