Quoted For Truth aka QFTThere is a huge difference between adding new nanos in an expansion like SL, and adding them in some "content upgrade".
Most of the people that will be using these nanos will be 220. They dont have any levels to go grind, they dont (mostly) have loads of uber phats to go camp, they are by and large at or close to endgame.
If the intention is to avoid people using NR, its really quite simple to work out what are reasonable reqs.
While there may be new buffing items available down the line, you cant expect people to say "oh great new nanos lets stick em in the bank for a few months until the other content catches up".
In addition, people dont want to radically change their setup everytime you introduce some new content, especially as FC are so retentive about IPRs.
And If you are going to give them ridiculous requirements, then make them ridiculous for every prof, not almost impossible for some and doable unbuffed for others.
Finally, if you want to make the nanos very hard to cast, they need to be worth casting.