Dennis, if you're losing strokes from your iron play and ball striking, and not poor putting or driving in example, you may not have the right lie/loft/length/club head and shaft combination.

If I were you, I'd take the irons to another fitter/club builder and get another fitting. You may find the specs aren't optimal, or that they are, and go from there.

Have you had any sports injuries or anything that might impact your flexibility, strength and conditioning? Personally, I'm getting physio to help with limited hip flexibility and a perpetual sore lower back.