What temp are you serving at? Temperature is a very important factor in balancing a keg. You need to know what temp the beer in the keg is at to know what pressure to set it at to get a certain level of carbonation. Also the temperature of your tap is also important. If the tap is warm, it will...

If you add this malt as a custom addition, stats are PPG: 34 Lovi: 46 https://www.brewtoad.com/generic-fermentables/203

I use half a tab and do 23L batches (5.5 gallons I think) Perfectly clear beers. Pretty sure could use even less. They aren't particularly expensive though so its not a big deal. I use half so I have to buy them less often purely for convenience.

I also like caraaroma for delivering nice deep red hues and some solid maltiness. Bought a kg of it a couple of moths ago and been loving the brews with it.

I would drop the crystal down to around 4oz, half a pound will be quite chewy and really dominate the brew, especially in a 3 gallon batch. I would also consider moving more of the hops to the late additions and add the bittering hops at either 60mins or FWH. something like .5oz FWH .5oz 10min...