Ann: DFS Confirms NAL Value With A$2.2B NPV, page-356

Same thing that every other offtaker does. They adjust for it at the converter.
There seems to be a bizarre narrative that is it ain't SC6.0 it isn't good enough for batteries.
PLL's offtaker will adjust their price for the Sayona Quebec product to factor in the additional costs like all offtakers do - including whoever buys the remaining SC5.4 from the JV.
They will process it into the same intended end product.
The number following SC just indicates the percentage of contained lithia Li2O. As long as the impurities such as Fe are within acceptable limits the difference between SC5.4 and 6.0 is essentially a matter of cost to process.

As for strip ratio. Most of it is prestrip at the front end. That was happening regardless. The LOM figure is higher because of the change in block model. Previously there were many years on the tail end of very low strip.

This should all have been anticipated. The brownfield project metrics were well known. This is a restart that was never going to magically change it's nature. It is also common place in the lithium indistry for feasibilty studies to be quite detached from reality. As a project enters actual production, paper forecasts need to meet actuality and you are seeing a step towards this with this DFS update.

Do I think the DFS forecasts will be met? No. Particularly in regards to recovery rates. It is a tricky deposit and large scale commercial production is very different to met testing in a lab.

What I do think is that the DFS was a necessary update in terms of continuous disclosure requirements. The asx is very loose with that as a concept, but generally speaking companies do need to make it appear like they are trying.

Obviously given the project is now in production and the nameplate was previously announced, the company has known for quite some time that they were aiming to produce SC5.4 and details like that need to be disclosed to investors before it becomes apparent from sales.

All of this doesn't change the concensus that long term Spodumene Concentrate pricing will be above Sayona Quebec's AISC, and that is what matters most.

Best of luck.