Based on my experience so far:
- Stay away from downgrade based I-485(no PP and that perm pull is like a black hole - See image below)
- EAD /AP filing seems innocuous. You never know when and if you may need it so probably file it anyway. Con is spending money and as some people suggest - increasing workload.
- Sending medicals with 485 filing is a must. Do not miss it!
Nothing else specific comes to mind. My friends who were able to do straight filing are in a lot better position so just follow that path and sit tight.
p.s.:
Summing up popular opinions here - there are two main reasons a lot more people from Oct - Nov 2020 batch are not getting greened right now:
- Medicals were not included in Oct,Nov 2020 first time I-485, straight filers
- downgrade I-140s are stuck even after 8 - 9 months
Best to stay away from these two issues.