There are few things I think I have to clarify to get everyone understand which sporks are important for payments and stability, what incentives are there, why sporks are enabled in this specific order and at some specific time, and "why don't we enable every spork right now?".

So, there is an incentive...
1) to be in first ~1/3 of updated masternodes because they do not lose their place in queue;
2) to update later (i.e. to be in second 1/3) because it's clear that significant portion of mns is already updated and spork10 will be enabled soon (technically speaking, we don't need majority here and could turn spork10 on as soon as 1/3 was updated but clearly it's much better to have more support and fix issues if any at a smaller scale, so we still give mn owners some time to sort things out, get last payment keeping older mn etc. - spork10 was enabled only after ~2/3 of mns were updated);
3) to update in the last 1/3 because at this time spork10 is enabled and you'll get no more payments running old version.
Imo all incentives and times are aligned well enough here.

Now, when most of mns are finally running new version, mn winners list should start to stabilize. That's the thing we use to figure out parts of coinbase txes and we _need_ it to be consistent before enabling spork8 (which most people are referring as simply "enforcement") because otherwise different nodes could arrive at different voting results and will simply reject "wrong" blocks (and ban "wrong" peers), meaning that network can split in 2+ forks which would mean that:
- we'll have to disable it again to resolve forks i.e. it's going to be the same sitataion as it's now (payments wise);
- masternodes on the "wrong" fork are going to expire if fork will last for too long (3h+) i.e. they are going to lose their place in payment queue on the "right" chain and mn owners will have to spend more time on maintaining them and bringing them back online;
- miners on the wrong fork will waste their money for no reward while they did nothing wrong, they just mined the block they thought should be valid as usual.

Think of an upgrade as of a stress event for the network - for stabilization to happen we have to give it some time to "calm down". Miners did their job amazingly fast this time (kudos to them), mn owners seems to be not so good at updates but, hey, it's only a week since the official release and mn owners are less techy in general I guess.

To sum up, I think that network is doing great so far and the least thing we need is to rush now because of the reason that some mn payments are "stolen" by some miners.