The unit that is not updated, I've already done significant upgrades like flooring, new trim, doors, appliances and current tenant accepted my increase to $850/MO.

I have tried using a plastic trim piece between. the cabinets and the floor to keep them from contact smaller spills and leaks on the floor.

It Depends.Potentially capital investments in the properties could have accelerated depreciation benefits (carpet, LVT, trim, appliances), while also allowing you to drive higher rents, thus saving on some taxes in the short run while driving increased values. 

Even if the said Reno’s are as small as a few pieces of trim and some missing soffit? 

A lot of sellers overlook this simple step of trimming the shrubs and trees away from the home.

If a house does have some rotten wood ( siding and trim around the windows and or doors , missing an appliance or two ( say there's no stove or dishwasher ) ......

Then final trim and inspect. 

Meanwhile you can do exterior, trim trees, remove shrubs, roofing first, then lawn and landscape so it has time to grow in, driveway if you need a new one last. 

Flooring, kitchen, baths, drywall, trim, doors, flooring, lighting.

@Benjamin SulkaThis one was mostly cosmetic: paint, carpet/floors, light fixtures, trim, landscape clean up, rodent remediation, bathroom vanities in the 1/2 baths, and some of the windows.Rehabbed one unit at the time aside from the windows.