But, it might be a bit awkward to make those calls when you're at work at non-landlord job.

Things usually turn sour sooner or later and it's way more awkward and painful to walk away from family and long-time friendships than a business partner.

After they vacate, if the modifications they did are a burden to the next renters or deemed to awkward to re rent, then you can ask them to put back to original condition. 

Over the years, those things will lose value.The house on the peninsula, most the structures are worth next to nothing, over 90 years of age, settled foundation, awkward floor plan, possible lead paint, asbestos, leaking sewer lateral, cracks on the wall, you name it.

I think that is awkward.

Also, it's awkward to ask for another pet fee at lease renewal. 

Although it can feel awkward the best way is probably to meet most of the tenants in person.

That would eliminate the awkward extra foot of height you have, but the joints on the MDF would pose a new problem.

I blew up at him and told he he no right to tell me what to do with the house, etc, and a bunch of obsenities were exchanged and he stormed, out, and then it was awkward because that other person was still there, but she left too.

Your example is a little awkward because I'm not sure why you would have done an exchange on prop B if no gain.