I accept I must stop myself but here we go.
Firstly something like at least £100m of cost has been expended so far - litigation is expensive but this is already one of the costliest disputes in British legal history. There is a very good chance it will end as the costliest dispute ever in British history. That in itself is the end of the story on complexity.
But even if you want to go on, we don't know the full list of issues but rest assured you haven't covered them all there nor are they as simple as you assert. There was an extraordinarily large set of barristers on both sides to cover all the issues and all the witnesses. There is therefore undeniably a huge amount of ground to traverse in the hearing.
Of course not every document in disclosure is in play in the hearing. But the bundle will still have been hundreds of thousands of pages long. Simple cases don't take 10 weeks. Jury trial experience is, frankly, totally irrelevant - this is just not the same audience for the evidence or the level of complexity that will be presented.
It is also complex because it combines commercial agreements, accounting practice, cash movements, potentially accounting standards, potentially valuations, multi year breaches and therefore questions of intepretation as to rules in any given year, forensic accounting, witness evidence across multiple companies on and on. It is so obviously a complex case.