For sure just an anecdote but I increased my FTP setting one watt each time my fitness chart went from transition to one week in the green zone. Each time i did that, my one hour hill climb power went up one watt.
Now if i think the number of times i could possibly do this in a year, its probably 10-15 times which might correlate to a possible increase in your one hour power watts.
just an observation. Not saying youll have these results. Just sharing what i saw.