personally I find the token system to be alright. Yes, some tokens exchange rates are god awful.
Daughter Tokens. Its usually worth getting the bigger packs, because the smaller packs still require a lot of single parts in way too high stack count.
Same applies to Son, but even more extreme. (1 token cost me 8 common 5 uncommon/rare tags. yet the 4 tokens sometimes just cost 1 rare, and 2 common tag)
With Father its totally worth buying all. but with recent changes to residue spawn-count, it has become less worth/even affordable to buy bigger token packs.
The problem is