I would be totally fine if they added something similar but different. Maybe quests/merits to enhance currently owned WS/abilities until you decide you've made a mistake and remove it.

Like say LNC has 10 total possible upgrades, for 10 different abilities/traits. Each one can be upgraded twice, but we're only allowed 6 upgrades. So you could enhance 3 WS/ability/traits twice or mix and match. The upgrades wouldnt be too powerful, like stun time +1 on leg sweep, or dmg+ a little on true thrust. OR it could be entirely different things: add DoT to Vorpal Thrust, life surge effects pt members to a small degree etc

so you could upgrade 6 different things out of 10 total, or make your own combo through either questing/merits (those numbers are out of my ass of course, they can choose w/e they want)