I 100%^ agree. The new line of spyders are great and the market is pretty much void of aftermarket parts.
Tech t made a bolt that is a minor improvement. Mostly increases your tank efficiency. If you get it find a chrono and turn down your reg to meet the field limit (280fps ISH). Maybe play with a spring kit, big maybe.
Me personally I don't like the spyder 1 piece so i find an aftermarket barrel to my preference.
So I don't think the reg and bottom line is bad, in fact its so much more acceptable to use as is that any change is mostly for your preference. The reg however isn't the easiest to adjust, or take apart and maintain, but it works. In the past for example BL torps and palmers stabiler have been popular choices because of their CO2 friendliness, or maybe you want a cool matching color combo and take a Custom products barrel/reg/rail adapter/ reg combo which you can get all in the same exact color. For me I'm a little more practicle, on the 08 electra I actually like macro line fitting for quick tear down, and happen to use a BL 360 reg and gear drive. These days i would throw on my AKA sidewinder and 1/4 turn on/off again with marcro line. Easy to use, easy to tune, and easy to maintain is my concern mostly.
There are no grips made, no triggers, no boards specifically made, no feednecks, and while the older aftermarket valves physically fit getting them secure and working correctly in the newer guns I would describe them as not made for the 08+