I’ve thought about it, as have most of the posters on here. You’ve failed to explain what would be the attraction for the EPL clubs, their fans and sponsors.
The harsh reality is that introducing Scottish clubs would reduce the quality (and profitability) of the league. The OF “might” be exceptions, but they’d bring a hefty downside in the shape of hordes of knuckle-dragging bigoted supporters laying waste to English towns.