The problem with the LP's (Lease Purchase) is whilst the balloon is fixed, it's just indicative, it isn't guaranteed meaning there's no 'hand back' or Trade-In option at the end of the agreement, you have to pay balloon payment regardless if you keep the car or not. If the car is worth less than the balloon, you have to find the difference.
In the current financial economy of uncertainty it would take a brave man to take a balloon payment out which isn't a guaranteed value.
The only thing you are losing here is some kind of mega crash protection, because nobody in recent years makes money on PCP GFV, its always a loss (especially when you factor in the interest rates). The only upside is in the event of a major economic downturn the GFV is the GFV and you might end up winning after VWFS pay 8 grand for a vehicle now worth 6.
Subtle shifts you'll not benefit from at all.
However with LP, its no different to cash purchase.... its a 30k car, you pay 30k (plus some interest). After 3 years you finish paying and its all yours - depreciation and all.
TBH there is no one winning formula in car finance. It depends on the deals on offer at that moment and your ongoing available cash to cover it. Some people get very lucky and get an good deal, most get a average deal and the finance companies are very happy with that.