You're in the same situation as me. I spent on my account and got myself up to 4 light SSRs before I found out about rerolling, and didn't want to start fresh so I know how you feel. While I'm not gonna push you to reroll, I will elaborate a little on Slashley's warning based on my own experiences without a 100% eido just so you know what you're getting yourself into:
1. It's hard to make and KEEP friends with 100% eido without one yourself - I make new friends with fluffy (Managarmr - 100% light eido) almost as quickly as I am losing them.
2. Without 100% eido yourself AND without 100% eido support, you're probably dealing about a third dmg less or worse than everyone else.
3. When you get to the point where you start doing rag raids, your lower dmg makes MVP racing close to impossible, which results in:
3a. Much worse drops - like MUCH MUCH worse, MVP in rags guarantees a magna and two extra chances of getting phantom weapons, VMVP guarantees you absolutely nothing - I have lost track of the number of times I got only 3 seeds for VMVP-ing a rag.
3b. You can overcome this by just leeching lots of raids, but a lot of strong players do not want weaker players in their friend list, so if you don't do well in rag raids, you get kicked, making it much harder for you to even access rag raids in the first place.
3b.i. Getting into a good union helps mitigate this, but a lot of good unions only accept other strong players and/or ppl that are willing to be paratrain slaves and/or really really active
3c. You can attempt to MVP a struggling raid using an endurance team but that takes a lot longer to clear stuff, so you may MVP one raid while everyone else may have done half a dozen raids in the meantime (not an exaggeration, oh and remember quasi-solo-ing rag is non-trivial even for strong players and you have to get it done in an hour or fail, so you can't just turtle infinitely - this is coming from someone who is infamous for turtling infinitely.)
3c.i. There is a huge flaw in trying to MVP a struggling raid btw, and that is some strong player can still come in and burst twice for insane dmg and steal your MVP, so you just spent a lot of time manual-ing for mere VMVP, here's your 3 seeds, congratulations.
3d. Some rags seem designed to hate weaker players, where if you can't defeat something in a fixed number of turns, you've basically lost (looking at you lrag.)
4. There is an upcoming farmable eido that can sort of close the power gap with a 100% eido, but it has more hp than rags, so all the problems I described for rags apply here, so another catch-22.
5. Events that give the best rewards are all ranked (UE, tower, dummy) so falling behind can become a vicious cycle.
There's basically the equivalent of a poverty trap in this game. It's almost a different game depending on whether you manage to get into a strong friend/union network or not and possession of a 100% eido has strong influence on which side of the divide you end up on. The game is still playable without a strong friend network, but it'll require a lot more luck and/or some crazy plans to farm end-game content.
tl;dr life without 100% eido sucks 'cos almost no one wants to befriend you and end-game content can't be cleared solo.