When the different style is proving to be an unsuccessful one you have to question the style though.
Difference for difference sake isn’t a good thing. As you’ve pointed out earlier we seem to be pressing higher & causing more turnovers of possession but that in itself isn’t a playing style it’s a characteristic of one.
You keep going back to their being highs & lows in any transition which is obvious but the highs aren’t there in this transitional period. What you’re doing is assuming that time will solve all which is looking like blind optimism currently.
Firstly, this isn't difference for difference sake. It's difference because our mid/low block of the Ole and Mou eras has a clear ceiling of success due to the lack of control we have over matches, and how much we struggle to break down teams who sit deep against us. We need to adopt a more proactive approach of some variety in order to build for long term success.
As for your final line, I haven't claimed at any point that time will solve it by itself. My point was that no system will work immediately without any wrinkles given our personnel. It takes players unused to a system time to get used to it, and some simply won't be suited to it, and replacing those players with ones that are also takes time when limited the way we are with poor scouting and a budget that allows 3 signings per year. No matter who we appoint, no matter what proactive style they try to implement, it'll come with pain, poor form, and losses until we get more comfortable and experienced with it, and that'll only happen if we stick with it through the tough times rather than throwing it in the bin because it isn't immediately successful.
We have had highs, there are periods of matches we've looked excellent this season (first half against Spurs, Palace away, most of the Arsenal match except for just after scoring, Forest after the 4th minute, Galatasaray apart from the defensive brainfarts, Copenhagen, etc). As previously mentioned we're now really good at winning the ball high, we're also much more confident and composed in possession at the back, those are 2 key areas of the system we've made great progress in. There are clearly areas we're yet to make enough progress in, such as using those turnovers, defensive third pressures, and recovering from a broken press, which are why we're struggling.
In the system we're trying to implement, the positives easily outweigh the negatives when playing it to it's full potential. We're obviously nowhere near there but the same point remains - that would be the case with most systems we adopt, and at some point we need to actually see one through, even if it takes several managers.