Rewards of additional ISO are not very meaningful at high S.H.I.E.L.D. Ranks. (e.g. I have been sitting on 11,000,000+ ISO-8 for a very long time and it is difficult to feel any achievement in advancing a S.H.I.E.L.D. Rank and getting around 100,000 ISO-8 as a reward). I suggest redrafting the rewards structure to include different rewards at each S.H.I.E.L.D. Rank achievement.
Yeah, maybe give Hero Points at higher levels instead. I’m sure people always need slots for new characters.
Or give some choices, like iso, hp, cp, some tokens or favourite shards, and let players pick one of them when rank up.
Could be the next big windfall for long-term players. Memorable events. Might go some way to reducing any disappointment over buying so many roster slots at 2,000 hero points each, only to have them now drop to 1,200 each - with no restitution to date.