Not alone in your madness then at least
There are dozens of us!
amiami is already out of stock, and so is play-asia:
http://www.play-asia.com/ikenie-to-yuki-no-setsuna/13/70av9h
What does MM2 even mean ? They cant reinvent the wheel the base game is already very solid - just need to keep updating it over the course of the generation.
There's waaaaaaaaaaay more then enough not in MM1 to justify an MM2:
-fixed mario world checkpoint
-poisoned mushroom
-p wing
-on/off switch
-Tweester
-water on land
-One way pipe
-Pipe that lets you out in the same area (as seen in the smb3 wraparound pipeworld level in ludvig von koopa's world 7)
-wings being usable on yoshi
-multi coloured yoshi/koopas /w ability changes for ingested koopas
-Magic ball, so you can finish levels when YOU want them to be finished
-bosses (big boo, reznor, boom boom, kooplings)
-Slopes
-Vertical stages /w optional wrap-around
-Missing SMB3 powerups
-Use one games powerups in another game (ie yoshi/cape in SMB, raccon/hammer suit in SMW etc)
-Desert Theme
-Sky Theme
-Snow Theme
-Night Theme
-Tank Theme
-Battleship theme
-grab block
-3up
-dragon/star coin
-power balloon
-water levels that go up and down
-crushing columns
-controllable coin line block
-wind
-triangle block
-CHARGIN CHUCK
-angry sun
-all hammer bros (amazin/fire/boomerang/sumo etc)
-blargg
-thwimp
-eerie
-ninji
-boo block
-"floating" Boo Buddys (where they are not scared of you, but also move randomly, seen in SMW ghost houses)
-pokey
-nipper/fire nipper
-block goomba
-mechakoopa
-fishin lakitu/boo
-red pirahna plants that ignore whether you are near a pipe (SMB2/LL)
-jumping pirahana plants (though I guess wings kind of emulate this)
-ptooie
-rotating cannon
-fire snake
-flame chomp
-rotodisc
etc etc