What are your thoughts on, instead of having a 5th (or 10th) Shaman, swapping a single Shaman instead for a true Tank (Druid or Warrior since unfortunately Paladins can't group with Shamans in Classic)?

I would think it would make some things easier at least until cap and well geared. If I recall correctly you can do most things at cap with all shaman & no true tank once well geared but until then some things may be more doable...

I guess at cap I would want to eventually have a 5th Shaman (or all Shaman 10man) option so maybe best to just go all the way that way... Just not my initial inclination to have no tank so would need to reflect on it... If Paladin were an option that would be my hands down choice as Druid/Warrior are less optimal for me but my thoughts are to have at least one true tank option...