I think if Icom really wanted to grab the market between the 7300 and the 7610 they would come out with a radio with a 6" color touch screen, have one of the receive sections of the 7610 along with the Digi select in the front end, have a DVI output plus I/Q like the 7610, two antenna ports plus maybe 2 meters in the mix but that last option would kind of raise the price range a bit but be in the $2K range. Adding two would be nice but 160 threw 6 is more doable for the price. The problem with the 705 is Icom wanted to get a slice of the QRP market that Elecraft basically owns but its a DC to light radio so the buyers is someone who likes to experiment but seems to me it sell for about a year then sales figures drop off fast.
The 7300 is still selling but nowhere near two years ago but its still sold on price for performance cause its become the swiss army knife of radio's.
There 7610 has started to slow down cause of there long wait on replacing the screen issue plus the Yaesu FTDX101D has taken some of the market sales away but still one of the better stand alone SDR rigs out there. A single RX section version of the 7610 would be a good in between the 7300 and the 7610 cause right now the Yaesu FTDX10 is becoming the next jump up from the 7300 so Icom is losing sales in this area but Icom placed all of there apples to the 705 which really did not pan out to be another 7300, kind of a should have would have could have thing.