Is there any point optimizing before converting to Prototype?

I've seen a bit of conflicting information so just wanted to check a couple of things.

Say I have a Lexington DTTOC with Measured talent.

Firstly, does converting to prototype risk changing these attributes?

Secondly, in the release notes it states

Fully optimizing an item is not required before converting it to Prototype, as the upgraded version scales as if the item had been fully optimized.

Does this mean it is a total waste of resources to optimize to maximum values say, for example, DTTOC before converting? My read is yes, no point optimizing.

The only thing to focus on is get the attributes/talents to the correct ones and expertise 30.

Thanks for the advice!