Well, the fact that they are sniper rifles with scopes is the reason why such weapons have such a long range in SWC in the first place. That you need extra perception/a spotter may not necessarily be 100% realistic, but it's a gameplay decision. Weapons and combat matters are things that need to be balanced around gameplay rather than realism, above all else, in a game (which, for example, is why ammo was removed--very significant gameplay decision, but obviously unrealistic--even a weapon running on a power pack would need a recharge at some point, depending on the specifics of SW tech).
In this case, part of the balancing factor is that sniper rifles are significantly more powerful than weapons with a lower range, and using a spotter means you need to manually readjust your setup if your target moves around. It's the price you pay for using a powerful weapon. If you find it too annoying, use something that doesn't pack such a punch, essentially. We want to move away from the idea that there is one best weapon that everyone should try to acquire.
I'm not sure how clear Ten's response was to you, but macrobinocs are indeed implemented and immensely useful! They've been working for a few months; it was announced in some Sim News or sync post a while back.