If you are asking Team Titleist members who are here because we believe in the products and want to support them, the answer of course would be “make the change”. Realistically, the best thing you can do is find a good Titleist fitter and they will compare how you hit your current irons to what is available in the Titleist lineup. They will not force you to change if the numbers don’t show improvement but chances are, if you were not fit for your current irons, they will fit you into something that will improve your game.

Asking the question leads me to believe that in your mind you are thinking you might be missing out due to your clubs. That tells me that you are ready for a good fitting. Being that you posted on the Titleist website also tells me you are thinking Titleist might be the best choice. As Dale points out, find a good Titleist fitter and see what they come up with. I've been to a few, and never felt pressure to buy. They give you the best option from Titleist and leave the decision up to you.
The number one thing is to find a qualified fitter for whatever brand you choose. A few years back I was playing the TS2 driver and happy with it, but there was a TM fiiting at my course, and I got to talking with the fitter when he had a no-show, and he talked me into a quick fitting for fun. He was a good fitter and it was quite thorough. When we were done he gave me the specs for the best option he had, but told me honestly he could not offer me anything that improved on what I had. I respect that.

I agree with Dale go to a Titleist Fit Day. They will set you straight.

I went into my fitting completely blind and came out extremely happy. Honestly a game changer. The amount of options the fitters have access to and the ability to compare everything side by side is unbelievable. I ended up in something I probably wouldn’t have picked on my own, and it’s been a huge improvement.