John F.
Such an aircraft will certainly need large control surfaces and or control deflections to give it nippy handling but even with large manually operated surfaces one can arrange servo tabs/spring tabs/balance tabs/fiddle with hinge lines etc to keep them from needing large forces to displace them.
The way I see it- for a large heavy jet to have manual control forces with probably no powered back-up, and to operate over the high range of fast jet speeds down to approach speed, you would be setting the designer an almost impossible task without significant anhedral to balance the aircraft almost to the edge of negative stability. I'm sure the Soviets pull all the tricks they can with aerodynamic refinements, but the evidence is there in the anhedral.