It seems as though my clutch only shudders in 1st on warm days but is this something I should replace immediately ? I only have 25k on it but the owner before me was rough for 12 k on the clutch I'm assuming .
Sounds like a little minor glazing. Try driving slowly with the clutch partially engaged for a couple blocks. That little slippage can break the glaze and get it to be smooth again. Clutch life depends on operation but the stock clutch is pretty stout for stock stuff.