Reluctantly, Jim, I disagree. So many people these days use constructions such as "more unique", "somewhat unique" and "very unique" and so on. Like you, I don't care for these constructions, but if you research the history of its usage (which is fairly modern), you'll find that objections to the use of "unique" with modifiers come mostly from, er, grammar police.

I think you've got even less of a case with "perfect." Usages such as "more perfect, "less perfect" or "less than perfect" (I like that one...) and so on are so common that they have become standard English. You and I can bemoan to our hearts' content the fact that these undesirable expressions have wheedled their way sneakily into our language, but, as I always say, language it what we speak, not what grammar professors say we should speak. But we don't have to use things that we dislike, and you'll never hear me say, or see me type, "more unique."

Or albeit, or prior to...