Sounds like you need to focus more on the shafts. Hopefully you plan on doing a full fitting, and you'll see how important the right shaft is to your preferred flight path.

Being that you live in Carlsbad, it sounds like the upcoming TT Fitting Experience in Oceanside for the new Irons would be just the thing for you.

I will be 82 next month. I have played the 716 MB since they came out, same with the 915 driver and fairway metals.. I still carry my bag with nine clubs, play nine holes and average 45.. Is it worth looking into new clubs?

That’s really a question you should answer yourself. At 75, I’m finally moving to damaged control from trying to lowering my handicap. Your game is now strictly in the recreational area. How you lost a lot of distance with your 10 year old clubs? Are they feeling heavy at this time? Do any of your partners have a lighter weight clubs for you to hold?
Carrying only 9 clubs, working with a local pro or retail shop, you might look at used clubs. New drivers are $600+, irons are 200+. At least Titleist sells individual clubs, so you don’t need to order 7 irons or 3 wedges as a rack package. If you don’t find a newer version that feels better or is easier to hit, you can keep your current. At 75, my T200 irons with lighter, higher launching shafts are easier to hit than what I was using 10 years ago.

Your still a youngster. Will be 79 in September. Looking forward to 80. Moved to the T300 series when they first came out and R300 shafts. Am now playing the T350 irons and love them. Thanks to my fitters I have been convinced that regular shafts are what I need making life bit easier in all my clubs. The regular shaft sure makes hitting the new GTs more pleasurable. Agree with Barry. I too would check out new shafts and maybe take a look at the new clubs, at the fitting. Tell the fitter what you want and then let him/her do their thing.

I turned 65 a couple of months ago. My swing speed has decreased and I am hitting the T200 with senior flex Fubuki shafts. They launch significantly higher than my T350's with Tensei AV red senior shafts,

Turning 77 next month. I play senior shafts is my driver, 3 wood and hybrid, as I get a little more height and distance with these shafts. Still play regular flex with my irons, as I am more interested in accuracy that distance with these clubs. If I have to hit a 9 iron rather than a pitching wedge, so be it.

As others said, the VIP Fitting Day is right up your alley. You live in the area and since you're leaning on making a change, participating in the event will expose you to a tour level fitting in a venue that is hard to beat. Lastly, you'll get a new set of irons, and you'll see how they're built.