Reason: Many high-end players take pride in how they have multiple characters at Top 100 across Data Centers. However, this does not seem to be intention of the design — it introduces major conflict of interest with fair gameplay, rules and reward distribution. A bad situation that can be fixed without penalizing players with ”sudden rule change”.
I don't care about getting rewards on my alts. It's not a pride thing, it's a "I'm working nights for an entire week and my options are queue on JP or don't play feast at all because this mode is only active at specific hours".

If I could play EU feast whenever I wanted I probably wouldn't have as many alts, I tend to play different jobs on all my chars too, if I do this on my main I just get flamed for inting lol.