Well, while I'm not audiophile but clearly realize the soundstage is jeopardized and it's audible. The feeling that you have to use balance control even when played mono to 'move' the soundstage.
I'm in between swapping with some additional cutouts for tweeter spot to place mid-woofer instead and flipping front panel. Tweeter inserts onto the mid-woofer slot no problem.
Flipping the front panel would be ideal case only I have to de-couple it from the rest of chassis which is quite risky.
Placing the on their sides is common practice and I'm aware of that, however it still requires drivers to be mirrored.