well he is only loosing customers........
hahahahaha.... I've offered FREE Advice for years so I stay very busy and I loose customers everyday because I have more than I can handle trying to gain help so I do the best I can in all fairness but I no longer let the business run my life when it's family time, sorry I am not a youngster sitting on line all day and night like some of the others, no harm in that, been there just not what I can offer with a family of 3 kids and my wife.
Yes very sorry for the delay, been hard at work on many things but my online forum help suffered but still it's all things that will better our service this coming new year.
Now for your questions
As far as ride, most all our customers always come back to say they enjoy the new ride, it's a change for the better in handling and taking on the road conditions over the factory set up. The UCA's will fix the ride height issues and the shocks offer a better control over the factory shocks because they are not as loss, firmer as per control. The larger tires will soften the obstetrical in the road so over all the changes are preferred by most everyone. Some guys want more so we have a few other options but what you are looking at is a great start by far.
One very wise and vital things to consider is our tire and wheel suggestions and not go beyond them because most might say they have or few ours are on the small side but keeping the tires and wheels with in reason is a main part of the end results of ride quality and handling, go larger, sure they might "FIT" but it will come with a price of possibly ride quality that will not make you happy so just food for thought.
This must be the over all best combo we have installed on a 2011+, this tire and wheel fills in the wheel wells and still look nice as they don't stick out a ton. 2011 Chevy 2500HD Cognito leveling package by NorCalTruck.com - YouTube
Over all really sorry for the delays, I am sure you feel the value in our business but it's hard to keep up with the demand at the given time everyone wants the help so no hard feelings on my side, if you have not done anything yet or found help to your questions then I hope this all comes to a value with you and the wait from my side.