No. It's not subjective at all. Especially not in Lucin
If you're going to quantify every example of moves and skills, then I'd sure like you to clarify exactly what the benchmark standard for "good" and "awful" is. Correct me if I'm wrong here, I think you and I have vastly different interpretations of what qualifies as a well-made character, m'darling. ;3
Nor do I agree that it's worth mentioning that. That's like saying the sky is blue. Obviously casual fans who's only criteria is "play x character because I like them" will play her and there's zero wrong with that. In fact it's great! More power to them.
I'm going to take it at face value that you don't intend to use the word "casual" as a perjorative statement. That being said, I would strongly suggest to you that you be careful about bandying that kind of terminology about the place. It suggests that "competitive" play is somehow superior to "casual" play and comes across as grossly condescending, which I'm pretty sure was not the intended essence of your commentary. I just don't appreciate words like "awful" and "casual" being thrown about without much apparent forethought. To me, it suggests sentiments of arrogance and immaturity and doesn't help to develop any sort of cogent debate whatsoever.
But, that's always the case and is no kind of counterpoint to character analysis. In fact, it's still a good idea for those dedicated fans to know anything and everything they can about her.
I'm just gonna point out that I don't have any issue with people engaging in character analysis. If you somehow inferred that from my statement, then I apologise, because I don't actively object to it at all.
My issue is when the mentality develops to suggest that character analyses represent the objective value of a character's worth. If you want to say Lucina is inferior to Marth because of XYZ, then that's cool, but don't expect others to adopt such quantifications as the absolute authority on whether or not they should play a character. You can still play characters that are supposedly inferior to other characters and be able to triumph over players who choose to pick the supposedly superior players. At the end of the day, it comes down to skill just as much as it does understanding how a character works. To say that Marth is objectively the better choice and that Lucina is necessarily terrible by comparison and therefore not worth playing, as seems to be the general topic of conversation around here - that just doesn't make any sense to me.
But then again, I'm not looking to vindicate my opinions either way. I'm just saying, it's good to approach things with an open mind and understand that some people like to consider that, just because a character doesn't conform to your absolute standards, doesn't mean they aren't worth playing.
To each their own, m'darling, to each their own~ <3
EDIT: Also, if you're going to engage in debate with somebody, please use the quote function. It makes it a lot easier to understand whom you're referring to and what you're responding to in question.