Generally, fractional rigs obtain most of their driving force from a larger main with a smaller 110 jib headsail. Whether your boat is over powered due to the larger genoa depends on where you sail and wind conditions encountered. Typically a jib is 110 or less, and a genoa larger than 110. From the photo gallery it looks as though the 35.5 came with a 110 jib as standard. Our H28 fractional rig also came standard with a 110 jib.
You can keep your new genoa if you have the ability to reef it. It should work great in lighter air, but become a handful in heavier air without the ability to reef.