Tiered battles are coming whether you want them or not, so get used to the idea :-). They will be more historically accurate (Marder II's weren't trying to penetrate IS-3+ armor) and much more fun for the lower tier tanks as a result. The current EU beta setup is much more fun for the high tier tanks, who can one-shot vehicles they rarely or never saw during WW2 that can't hurt them in return. High-tier battles will not be useless. Credits are based on the quality of what you damage or kill. The high-tier vehicles currently need lots of kills to break even precisely because they aren't generally fighting each other.