Its also way more than 45-50% blue right now. We are more like at 60% based on what's in Mtgtop8.
Vintage has and will always have a high percentage of blue. There are 43 cards on the restricted list, and blue has the most powerful & highest quantity out of all the other colors.
Now look at the Top 20 cards played in the format.
8 artifact mana
3 lands (strip, waste, delta)
6 restricted blue (ancestral, brainstorm, dig, ponder, time walk, treasure cruise)
3 unrestricted blue (force, misstep, preordain)
Not on shops, white eldrazi, or dredge? Say your prayers, eat your vitamins, and fill your deck with busted blue cards. Tired of blue shell decks? Maybe Modern or Standard would be more to your liking.
FWIW, I play ravager shops, white eldrazi, BUG oath, UWR mentor, and UBR storm. I'm a nobody but I've been having fun in Vintage/type 1 ever since I picked up my first handful of Alliances boosters back in middle school. I've always been from the school of letting the format develop naturally through the future printing of cards.