well im not average and can spot 1 crochet use 3 years later (typically but not always)
to start over just to tnr..i'd say no. either tnr or crochet will take time to read and either will dread and be fine
if you were going to start over the only reason id rcommend it is if you felt strongly about going the natural route
in your research how often did you hear people saying just stop combing and it would dread?
thats the problem. nobody is aware that dreads are the natural state of hair, or that this is what happens from just camping a few weeks
they don't tell you that stuff like tnr, or crochet is unnecessary entirely. nor do they tell you how rewarding it is to simply let it dread. they don't tell you how you might feel like you cheated by using a starter method
they do demonize the natural method though claiming it looks horrible for years, claiming that you wont see dreads for 4 years, and claim they are "shitlocks"
they push more aggressive methods that require "pro" maintenance and "installation"
they don't want you to be aware of free and easy methods, and especially don't want you to know that dreads require nothing at all
I have never done a thing to mine
now.. why i say that starting over should only be considered if you want to go natural:
the crochet damage is already done combing out will only add more (slightly)
tnr or crochet 4 years from now will look very similar
the main reason to start over isn't cause you choose the wrong starter method but cause you choose a starter method at all
so, your choice is between starting over (and letting it go)
continuing on with or without maintenance (without is the only choice to make)
we call that "natural surrender' starting off with an unnatural method then surrendering to the natural process
no i would not try tightening anything for now
27 years growing dreadlocks the natural way
My dreads are over 9 feet long