Should I have my Vita Replaced?

Not too long ago, I asked about some problems I have been having with my Vita. I did get some help, but I am still having problems.

To start, the Vita is up to date and there are no physical damages done to the Vita.

The first problem is charging and transfering data. The Vita used to charge while being plugged into my PC, but I noticed it doesn't do this anymore. The touch screen also doesn't respond when it's plugged in sometimes.

The second issue also involves charging. I have noticed that sometimes the Vita stops working properly if it has been plugged in for too long. This makes me need to reset the system for it to work again, I think this may have to do with how I used to charge the system. I would put it inside the case and let it charge. I noticed it started overheating from being inside the case and would just turn off, so I started charging it outside of the case.

The only reason I am debating sending it in is I heard it can take a few weeks to send in and get the new one. I also have screen protectors on both sides of the system, and if I take them off, I can't use them on the new Vita.

Thanks in advance for any help you guys can give.

It sounds like a hardware failure to me. Just send it for replacement/repair, is better to wait a few weeks to get it fixed than wait for your vita to get worse (and if that happens you would need to send it anyway).