There is no reason why a heavy tank should dominate the battlefield or be more resistant to long range tank destroyers. I think it is a leftover of the heavy call-in meta where everyone got the idea that a heavy tank is what your army should be built around. Tiger should be just that - a heavy tank. One of the options. You have 78 more popcap in your arsenal to supplement it with other units, including the best handheld AT which decimates dedicated enemy tank destroyers.
A Tiger is not too slow for its class, it has really good frontal armour, requires no teching, and its gun packs a really good anti infantry and antitank punch. What else do you want from it? To be more survivable against its hard counters?
If you feel the Tiger isn't worth its resource cost, don't go for it. Wehrmacht has a strong core army and a wide selection of commanders. But I guarantee you lots of players will still use the Tiger.
You just can't use it with impunity if someone invests heavily in end-tier tank destroyers (Su85, FF, M36). And this is precisely as it should be, IMO.
