It's impossible to answer the, "is it worth it" question. Only OP knows how much a given $1 is worth to him in personal situation.

But, that said, there are many opptunities where a FC seat can be obtained through discounted FC, -UP fares and the like. Often for not much more than even certain discount Y seats.

Best thing to do is to look at the range of fares and figure out what the differential is to get you into F and then whether it's worth it to you personally.

On that route, I'd pay $150-200 extra for F. But, that's me.