I think Sony's problem was the line up was not spread out enough, the A57 was too close to the A65, or rather the A65 didn't in my view offer enough differences to justify the price difference (GPS, better EVF nothing handling or body control wise) so most people probably went for the A57. which also had a bigger buffer
What Sony should have done is made a new 6 series body that was half way between the 57 and 77. Instead they killed the A57 (a mistake in my view)
I don't like the current line up much either once the 65/77 (mkI) stock is gone you have only 3 models
A too basic A58, then a massive price jump to the A77 II, then another big jump to a FF Body.
Maybe they will add another model to the line up..maybe not. I think Sony really need to re-think this one. A newer A57 mkII would fill this gap well.
It is possible to have a 3 model line up..but you really need an upper entry model that's more competitive. You can't really have a £600 gap you miss many customers