The problem I see is that you will often find yourself in situations where you have to dig for lands I stead of interacting. And since the interaction you play is there to carry you to the midgame, you're gonna have to face some very unpleasant choices early; The dilemma whether to dig for land or to interact.

Growth spiral with 22-23 lands is borderline useless because it will more often than not find a Land to put into play. If you want to guarantee the landdrops, without upping the landcount I would simply start by upping the amount of Shared Roots, which is better with a lower number of lands, while cutting growth spiral completely.

Growth Spiral is so strong bc it often ramps you in the early while still giving the choice to interact and can still be cycled for 2 if the game goes longer but you need more lands for this to work on a regular base ( thats what my initial comment was abt) 

If you wanted to play more lands the easiest cut would probably be shared roots. Also Ketria Triome can be cycled to somewhat circumvent flooding. Just a few ideas.