I think you are confusing FFP with the TV money deal. Distributing the TV money more evenly across the leagues could reduce the chances of failing FFP for the lower league clubs as their income would be higher, however I suspect (no evidence for this) that this would just mean that the wages and transfer expenditure of the lower league clubs would increase.
The point is that simply increasing TV money will not remove the concerns that people have with FFP. I think the fundamental principle of clubs not spending more than they can bring in is sound. My concern with FFP is that should a rich owner(s) decide that they want to put there own money into the club in order to acheive what they want then this should be allowed as long as the debt does not become attached to the club, i.e. the money should be gifted. An owner may want to do this is they believe the club will be worth more if promotion is achieved, but does not tie the club to debt from their owner or investors if there is not promotion.