In this thought experiment, I start Magic from zero. I would start with two starter decks. Here they are. The first one is a White/Blue/Green creature deck with enough counterspells to slow a fast deck down.
The second one is an aggressive Black/Red deck.
With this restart, there are some really neat cards, a few over-powered cards, and a bunch of vanilla creatures and simple spells to improve upon. I would complement these with a first set that enabled more strategies. My restart of Magic would look a lot like the early Yugioh sets, and would not have a limited experience.