From: My Inner Designer To: Bungie UI Team (Destiny)

by Harmanimus , Tuesday, May 23, 2017, 19:47 (2528 days ago) @ INSANEdrive

This actually is a very logical expression of the breakdown. I assume the structure is meant for one part balancing and one part expanding (as it would be much easier to produce, test, and balance a new set of 4 perks than whole new subclasses if you want to expand capabilities) but the UI definitely doesn't really identify them as mutually exclusive. alternately, making them visually distinct from the other nodes, such as having the icons in those sections not otherwise bordered like the grenade, jump, and Class Abilities. To communicate that you are only actually selecting one node, and not a mix and match.