Hey Elliot,
unfortunately that request never made it into a Jira.
I’ve created a bug report now as UE-272843 and it should be visible in the public issue tracker here soon.
Given our current priorities I don’t think this will make it into 5.6, so if you want to set those parameters you’ll need to use the temporary one for now.
Given that the fix has low priority I don’t expect -iostorepatchpaddingalign to get removed soon, and if it’s removed it will likely be in combination with a fix for that Jira and hopefully a better way to specify it.
Unfortunately I don’t have much other advice for patch sizes on steam. Uncompressed can definitely help, so it’s worth trying those out. If the larger padding makes a big difference then this is likely the best approach if you also want compression.
You could try chunking or other approaches to manage your content in a way that minimizes modifications to certain files, but I don’t have any actual numbers on whether this will make a big impact for the steam patching algorithms.
Best,
Sebastian