Imagine for a second you run into a hand where you have 2 Fetid Heath a tec Edge and otherwise a nice hand. You've now got 3 colourless sources!
Its not the worst thing to have just that you need to decide a balance it to reduce the chance of it happening and maximize your fixing!
Chapels are nice but rely on having a swamp/Plains in play. Right now you have 11/22 lands that arent plains/swamps. (Not including Fetches) So alot of them wont trigger Chapels untap.
More fetchs could certainly fix the issue though they start to drain your life more. (This deck has alittle more flexibility on that front so thats nice.)
Theres no 100% Right answer really its just about playing around with what you have to make to reduce those wierd hands where you look at your hand and it throws you off a turn or two.