Crossover for Work interview questions

TOUGH! Probably the most work I've done in a selection process. You apply and then get emailed shortly after to go through to the crossover assessment portal. You fill in some information then the testing begins. For me it started with a Cognitive assessment test, 50 questions in 15 minutes, I didn't finish them all but passed it... If you've taken these kinds of tests before it's not that challenging although I answered 43 questions in total and still passed. To be honest I know a lot of people don't like this, for me I actually love it purely for selfish reasons, I'm a bit of a dab hand at these kinds of tests and a lot of my competition will either flat out refuse to do it or they will fail it. Better chance for me in a role that is paying more than any other on the market! Following successfully passing the CCAT I advanced to the language part of the assessment. This was pretty bog standard interview questions that you have to record an audio file answering(Biggest mistake and what did you learn etc.) Gives you time to actually prepare a few answers and although it tells you not too, I wrote a loose script and coming from a sales background I can make it sound conversational fairly comfortably. The issue at this point is once you've submitted, you move onto the next stage of the application (Which they time at 2.5 hours) however you have no idea if you've passed the language section. At this point I really didn't feel like investing 3 hours into something that I don't even know would be considered. I extended my deadline by a Week (They make you set a deadline at the beginning of the process, not sure why, seems like you can endlessly extend) and came back to it about 4 or 5 days later after a few chase up emails. Turns out I passed the Language section with a score of 100% (No idea what their marking criteria is, as with the CCAT you can't review your performance). On seeing this I got my second wind! Time to tackle the free form questions.... What came was slightly unexpected! The first task was to create a video talking about a suite of products at the end client. It's only a 3 minute video so the actual task isn't that tough but it's a lot of research and I know a fair amount about their offering now. Second free form task is to create a Customer Success Plan, this was even more work as you now have to go away and research individual products within the suite and map it against business needs (That you need to find with a google search!) for a blue chip client. Quite fatiguing at this point and you then move on to the final step which is writing an email to arrange a video call with the client, They say 250 words or less, mine was about 150 and I felt like I was dragging it on a bit! It's definitely a unique experience applying for this job and I know it will feel really great if I get the role. It's for sure an intensive process! I know in the role that I've applied for, most adverts get about 200-300 applicants and in an email followup prior to the free form questions they told me I was in the top 5% of applicants just getting that far so I imagine this is knocked down even further with the most time intensive piece still to do! I can see it definitely having a purpose for roles of this level, weed out the candidates who are applying to every job on LinkedIn, make sure you're bringing in people of a certain intelligence and certainly save time reviewing hundreds of applications! However you have to ask, for the more niche roles how effective is this? Are they driving away really good candidates because their process isn't competitive. I suppose you have to take the good with the bad and I imagine they've had some great success with a lot of roles!