What impact will having one less driver makes?
Absolutely none.
The important thing is the endgame, which is accurate sound reproduction. This means flat accurate on-axis FR and smooth off-axis FR and the ability to play @ the max comfortable volume without compressing. It doesn't matter if the speaker has 1 driver, 2 drivers, 3 drivers, or 20 drivers. It doesn't matter if the drivers are 5", 6", 8", 20". It doesn't matter if the driver is Al, Mg, Be, Diamond (C), Au, Ag, or Ti.
That's my opinion. The endgame is all I care about.