We go in circles. If you think that to boldly go, with a modifier between an empty morpheme and a full one is better than to go boldly, for you the question is answered. Really, unless a split infinitive is more sonorous than an unsplit one, there is no reason to split it.
Otto keeps giving reasons why the grammatical rule against them is wrong and Latinate. No one is arguing that the rule is right and one ought to follow Latinate uses. The argument is simply whether splitting leads to better writing. Those who think it does will judge accordingly and be accordingly judged.
On following poets as one's model, I notice that no one cites Milton in the service of making English more Latinate and adding a distinction beween kinds of objective cases, as in "hee" and "he," or following Chaucer back to Middle English whan that April with his showres soote, The droughte of March hath perced to the roote." Or for that matter Ben Jonson's line, when told that Shakespeare never blotted a line: "Would that he had blotted a thousand." But of course Scott tells us both to follow Shakespeare and to go with language wherever it takes us.
Like all entities through history, the English language has both lost and gained. Generally it has added vocabulary and generally for the good. It has lost any number of worthwhile distinctions, for instance the one between disinterest and lack of interest, which is on its deathbed, not to mention Chris's pet peeve, the difference between begging the question and evading it. The fact that the language has gained in places or even overall is no reason not to fight against losses.