Nah, the club + country constraints are more than enough. It removes the challenge of riding your luck on suboptimal picks designed to allow for the jackpot later.
E.g. in the All-Time draft I didn't pick an Argie at all and for most GOATs I picked a lower tier player for the same role to allow for straight upgrades: a German in midfield holding the slot for Kaiser or Lothar, a Brazilian upfront waiting for any number of Brazilian forwards, and so on. In turn,
@Cutch ended up losing because all his RB upgrades needed him losing a key player elsewhere.
Look at the R1 picks and think about how much harder it would be to plan ahead for a team that could accommodate them (e.g. not picking a key player that would clash with eventual Messi/Cristian/Maldini/Ronaldo/Goofy upgrade opportunities).
The eventual winner would necessarily be the drafter that found the best balance between progressing from R1 and upgrading effectively. That's actually the fun with tight constraints: can you navigate them so your reinforcements are giant leaps and not marginal cosmetic improvements.