Worth it, just how :-)?
Asking loosey-goosey questions like that, you're gonna get useless answers - even misleading and dangerous ones.
Ask specific, quantifiable questions, then learn enuff about boat
design and sailing that you can answer them yourself, and have confidence in your answers. For example: "If I make a sprit from DF how much will it weigh?" The answer is simple: 4 inches wide, 4 inches thick 4 foot long gives a volume of 4 x 4 x 48 cubic inches = 768 CuIn. A cubic foot (12 x 12 x 12) inches = 1,728 CuIn. Dry Douglas fir weighs about 34 lbs per CuFt, so your new sprit would weigh 34 x 768/1728 = 15 lbs. Less any wood lost
to tapering, so call it 12 lbs finished. Then add the hardware
and you are back to 15 lbs.
Don't ever accept answers from people who can't or won't or don't show you the numbers!
Snowpetrel is right: Go for simplicity for now till you learn these things.
Next question ("reworked" from your "benefits I'll gain" comment): "If I fit a sprit and run the existing genny at 150% foretriangle, having taken the stay to the end of the sprit, will I increase boat
speed 1/2 knot
in 15 knots of wind
compared with running the existing genny at 80% foretriangle with the stay taken to the stemhead?"
The answer is (probably) "No", but the calculations that will tell you are quite complicated. Ask the same question substituting 8 knots of wind
for the 15, and the answer is (probably) "Yes".
But as Snowpetrel sez: KISS. Remember that Willy Occam is the friend of the novice