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I think to distinguish them a little more from standard lizardfolk, let's get rid of the bite (unless the standard lizardfolk of that edition didn't have a bite, either).
The Monstrous Manual lizardfolk have bite attacks, but the Rules Compendium version (which may be closer to these kind) lack a bite. So I'd say our options are open.
Let's leave the tracking to their ranger leaders, and go with Power Attack.
Updated.
It looks like all that's left are bonus languages, organization, and treasure.
Standard lizardfolk have...
Bonus Languages: Aquan, Goblin, Gnoll, Orc.
Organization: Gang (2–3), band (6–10 plus 50% noncombatants plus 1 leader of 3rd–6th level), or tribe (30–60 plus 2 lieutenants of 3rd–6th level and 1 leader of 4th–10th level)