What's wrong with Minimism?

For the record, I wouldn't think Newman's minimism would be much of an obstacle towards the city of eternal truth. Here from online source:

"[Cardinal] Newman's demeanour towards authority was ever one of submission; but, as he wrote to Phillips de Lisle in 1848, "it is no new thing with me to feel little sympathy with parties, or extreme opinions of any kind." In recommending the Creed he would employ

"a wise and gentle minimism",

not extenuating what was true but setting down nought in malice."

"The "Grammar of Assent" illustrates and defends this method, in which human nature is not left out of account. It is curiously Baconian, for it eschews abstractions and metaphysics, being directed to the problem of concrete affirmation, its motives in fact, and its relation to the personality of the individual. This hitherto unexplored province of apologetics lay dark, while the objective reasons for assent had engrossed attention; we might term it the casuistry of belief. Newman brought to the solution a profound acquaintance with the human heart, which was his own; a resolve to stand by experience; and a subtilty of expression corresponding to his fine analysis. He believed in "implicit" logic, varied and converging proofs, indirect demonstration (ex impossibili or ex absurdo); assent, in short, in not a mechanical echo of the syllogism but a vital act, distinct and determined."

So there.