I'd rather play 6 more monthes capped at level 4 until they fix what has to be and add what's missing than adding new problems with level 5 right now.
The counterargument to this is that adding level 5 will exacerbate the current problems, making them more obvious (hopefully) to Larian that they need fixing. E.g., we'll actually see what the effect of double fireball is (triple with quicken+haste and a scroll), UI problems due to a whole additional level's worth of spells, how Larian implements Extra Attack, etc.
