Consistency is rewarded: top 5 franchises - no.5, with a bullet

After the horrible experience in Antwerp last time around, it's time to find some places to rely on. So here comes a countdown of the top five franchises I've tried.

Where: Quick, Brussels centre. A Belgian franchise which always tends to be located near my workplace, no matter where I work. Seeing as the only other franchise in Belgium is that famous McDowell's copy, Quick's rated the best franchise in Belgium.
Burger: The burger is a "twin beef", which is actually two burgers kind of joined at the hip. One half (right-left, not top-bottom) has a nice salsa sauce, which is really the only taste you can distinguish. The meat is well-cooked, but just doesn't break through the wall of sauce. The bun is a bit spongy. The second half topped with fresh red onions, which is a superb burger topping, ketchup and mayo. Again the taste of the meat doesn't really deliver: there's too much bun, relish and sauce. It's all very well-prepared, the food tastes extremely fresh, it even looks nice, but if it were up to me, I'd double up on the meat to give it more body.
Drink: Spa blauw
Side: Belgian fries, of course. Thin-cut, salt-free and fresh. The outside is crispy and nice, but the inside is what we in Sweden would call "flour-y". The fries definitely need some sauce for dipping, but I dislike having to pay for ketchup (and mayo) at a burger joint. All in all, nothing wrong with the quality here, it's just a question of taste. They deserve credit for not pouring salt on the fries (and salt is available for free).
Cost: €6, which is pretty good value for money for a medium-sized meal.
Question: Why not up the beef and the confidence and sell the mini-burgers as separate, big burgers?