This is equal parts "makes sense", "at least", and "yeeesh".
(I like the idea of Rodimus at least being teased or hinted to link to it, since the 86 movie did have a sorta chosen one, prophecy vibe attached to it. Glad IDW went a slightly different direction and made him insufferable just in general rather than focus on this. But it would be interesting in another story to see Rodimus struggle to live up not just to succeeding Optimus -- the side of it that's gotten more focus -- but to allegedly being THE guy. And then later on, perhaps after retiring or withdrawing, realizing -- or deciding -- that it's an ongoing "legend" they stoke: there's always someone "destined" to one day rise from the ranks and light their darkest hour, and it's all about helping the next generation grow into it rather than anyone being the sole make-or-break hope. Be a neat play on leadership and even individual heroism narratives.)
But then I go back and forth about whether I even really want a "known" Thirteen, or just perennially and persistently rumored but never found ones. I do know I prefer the idea of a plurality of beliefs akin to what we have; it seems more interesting than "validating" one set and making them characters.
I enjoyed the idea at the time of the Guiding Hand and Thirteen somehow coexisting in IDW lore, until they wound up validating one and Shockwave-ing the other, bringing us kind of back where we started.