1- milspec wasn't even a term used with Tavors until North Sylva coined the term to generate sales to clear out their old inventory to prepare for the new US assembled Tavors. Milspec makes sense when talking about AR's where you have 1000's of manufacturers, but with Tavors you only have IWI and Fort.
2- Most US Tavor SAR-21 or x95 parts (specifically all the integral internal components are still Israeli produced, then just assembled state side.
3- the extended buttpad on the x95 is there to meet the US NFA laws to keep the rifle over 26" long. Since our version has a barrel a couple extra inches long we do not require the extended buttpad to meet the minimum OAL of 26", so chances are that if ours do come bastardized we can get a replacement thin buttpad.
As for selling a TAR or SAR to get a x95 (they are all models of Tavor) I would say no, civy x95's dont get a whole lot more compact due to barrel length requirments unless you go restricted. There is also some questionable accuracy results from some of the first US x95 design in the wild. Lastly I find the egos and controls on the TAR/SAR to be very intuitive to new shooters, the mag release and bolt release are very well thought out and make sense to a first timer.