Well, I work on the heroes that I like to work on - be it old or new everyone chooses who they want to work on.
The issue is that the War Reward hero is a complete random hero from a fairly large pool, and unless someone is working on every single hero from that pool, there’s a chance that the reward is going to be useless.
eg. Aurora is a great hero, and someone who uses her might be delighted to receive her chips as a reward. But while she is great, that doesn’t guarantee that everyone is using her - far from it. If someone receives her chips and they still have her at White rank - they aren’t going to enjoy the reward very much at all.
A choice of Hero Chips & Skill Chips (maybe from 3 options like War Crates, or even just from that same large hero pool?) would be much better and make sure everyone gets their fair reward that they’ve earned.
Similar is true for the Megabits reward - though Megabits aren’t as important in general - but one of my accounts got the same type as last season, so now it’s got just tons of that type while the others are languishing.
We work hard at War over the season and to have the final, season’s end reward significantly differing in quality on a per-player basis by complete RNG is just rubbish