I went on 737 from Frankfurt to Accra on one of the Privatair-operated LH routes. I was a bit apprehensive, but it was very pleasant and certainly no worse that 10 across on a BA747. Must have been about the limit of the aircraft’s range.
The challenge with what you say rferguson is that if everyone brings aboard their baggage allowance on a FlyDubai flight it won’t fit in the lockers. So eventually someone has to give way or you end up sitting there. I sense on this one there may be more than meets the eye anyway.