It's ok bro, we all feel like that sometimes (more often than not). I know I certainly did when I took a break from the game.
If I'm going to be completely honest I basically secretly plan to stop using weegee in tourney as soon as I become good enough at Toon Link/Pikachu to hold my own. It's frustrating playing a good opponent who can bait you and knows what Luigi can do.
On the other hand: the Luigi community is second to none in downright chill attitude and being cool bros, and there's something distinctly satisfying about murking scrubs with WEEEGEEEE!
Just don't feel bad about it, you're not the only one moving on a bit. Luigi still #1 in mah heart though. (and the Olimar MU)
On a metagame related note: seeing Metagame Minute's little dissertation on RCO lag gave me some hope/insight about Jab>UpB in situations where it might not otherwise be a solid option. (also it's something every Luigi should be aware of since we're on the list of recoveries for whom it affects; I had known about this with Marth, but it certainly explained a lot of things about why I was always such a target coming back on stage in certain situations as Luigi as well)
http://www.youtube.com/user/VideoGameBootCamp#p/c/F52238E65D6ED18D/9/FWH-py8VENU