Complete degoogle vs nano Open Gapps

I currently have an old Motorola completely degoogled using LineageOS. But I am not able to use this phone as a daily driver because of lack of banking apps. I do have an option to download those apps through AuroraStore, but I have also rooted my device and not sure if this is advisable.

How much of a downside there is to using nano GAPPS instead of a completely degoogled phone? Gapps will give me an added benefit of being able to use Android Auto.