I am not aware of any different preheat or delayed cracking concerns. I treat it the same as I would A709 grade 50.
My D1.5 PQR's are done with A709-50W so that they cover the lesser grades as well. That allows fillets up to 5/16" (single pass) without the need for a matching filler metal. If I need a matching filler metal on grooves then I can weld out all but the cap passes with non-weathing electrodes.
I recall there used to be a concern with low heat input WPS's , and also with arc strikes, but that seems to be history from what I have seen. Those issues are now handled as routine in the D1.5 code; I can't say for other welding codes.

Chet Guilford