LLC Nuances...changing states?

[Pixel Rogue]

I have a few properties each with their LLC.
LLC's are in the state of PA, and currently using a registered agent and looking to make a change or two. 
Have business with a service that recently opened a branch in DE, which is what started the idea.

Are there any benefits, risks to moving the LLCs to Delaware?
Also, can LLC's 'be moved' ~ so for example a few properties have loans under the LLC name. 
Can switching be as simple as signing up w/a registered agent in DE and then transfer from PA?

Not much profit in the business btw, not sure what business requirements or responsibilities would change by moving to DE.