Understandable. I just don't like to swap unless I know for sure it's a hardware issue. I've swapped thinking it could fix something and it didn't. Then I inherited issues like dead pixels or other things and then had to swap again. Apple tracks your swaps and repairs so I only do warranty swaps if I feel like that's my only choice to resolve something or know it's not a software issue.
I hear you. I hate swapping also, but I can't believe the difference it made. My previous phone was hooped, lol. The most noticeable change is the fingerprint reader. It would take over a second to read my thumb on my original phone, sometimes taking 2 tries. This one is fast. If I wake the display up by clicking the home button, it's read my print and is unlocked the by the time the screen comes on.
I am one happy man because my original 5s was about the same speed as my 5, and I wasn't that impressed with it after paying full retail for it.
This replacement is definitely faster opening apps, etc.