Answers

I do not work on pools, but used to have an in ground with vinyl liner in my home.  The first thing that came to mind when I started reading your post was switch to salt water.  Then I read that you mentioned that!  I don't know all the benefits why you should, but I thought the largest were that they are easier to maintain and don't require as much chemical as a chlorinated pool.  Some people I know say that they are much more enjoyable to swim in as well.  

Galloway Roofing & Siding does not work on Pools.

Great questions. Answer will depend on your overall renovation budget and projected use of the pool.

You may wish to track your use and cost (maintanence, electric, water, personal hours cleaning, chemicals)  for one year to help assist you with a renovation option.

A concrete pool can be a better option as it reflects back the stylish arrangement of the pool. It seems to be really trendy which most of the people are preferring to build in their new home. Moreover, buying the stylish set of a sofa which can be kept outside near the pool is another option you can choose to go with as it will add extra beauty to your backyard. A number of people are heading towards the genuine store like office furniture solutions in order to get the fair deals in buying furniture. If you want, you can also go this way and can give a new look to your backyard this time.