With a good string, you should get a little better performance, the bow may be quieter (tuning has a lot to do with that), and it will weaken the effective spine of your arrows a little. You can also go up to a 125 grain point or heavier for that.
Quick update on this... got around to testing some 125 grain points and bought them for all my arrows immediately.
20 yard groups are around 4"-5" consistently and I haven't been shooting much lately.
I'll attribute some of it to my form improving, but the random fliers are almost non-existent. I really think the extra 25 grains on the tip helped immensely.