+1 for more complex armor in D&D. The current system is so basic, where less expensive armor is basically strictly inferior and thus becomes worthless when new armor is found. There's never really any choice of armor to wear. And yeah, some armors are completely useless to players because 1st level characters start out with better versions.
The Acrobatics and Athletics Disadvantage could help introduce more tradeoffs to armor; e.g., padded is better for stealth but leather is better for mobility. Or you can get armor with better AC, but worse stealth, athletics, and/or acrobatics. Potentially a highish strength score could allow players to ignore the athletics and/or acrobatics disadvantage? This would make strength less of a universal dump stat.
However, it doesn't really make sense that light armor could allow you to add your full Dex modifier to AC, but also give you Disadvantage on acrobatics checks...those seem contradictory.
