I have 143 Project files that I would like to Reload existing titleblocks in batch without over writing the parameter values. Would this be something that should be done in Dynamo or better suited to macro?
I would look into the Orchid/Synthetic package as a starting point. It might be worth contacting the author of the Orchid package for insight on how not to overwrite the parameters.
A messy alternative is to get all relevant parameters, reload, then set all relevant parameters before saving and closing.
See some nodes which achieve the various functions. It would be a complex script to put together, but hope this is a good starting point:
It may be worth investigating how to loop over a list of documents rather than process then as a list of elements - I believe the timing of these operations would not work well from an order/data flow perspective.