Sorry but I have to disagree with you, although there are places where you can find T4 crafters, they are very rare compared to EL map which have an absolute ton of small to medium and large camps, heck even many of the Exile camps have a chance to spawn several different T1-T4 crafters and with a much higher spawn chance for T4 than the ones on Siptah.
Siptah especially the main island has a few bigger camps and some small camps, but nowhere near the amount Exiled Lands has, Siptah sort of feels empty except for 2 areas on the added south part which usually is infested with gigantic player Mausoleums on official servers making it sometimes very hard to get to some canps and poi’s 
I don’t know how accurate the Siptah interactive map is anymore, but here is a screenshot of where possible T4 spawns can take place(some places have been changed and T4 spawns seems to be gone now), but tell me does this look spread out to you?
I think I know what camp you are thinking of…
Is it the Exile camp above the cave where you learn Sorcery?
If so, yes it has some crafters, but in no way comparable to Sinner’s refuge, there may be T4 spawn chance there, I just never have seen any there, mostly I did the Stygian, Accursed and Corsair camps, but many of them have a bunch of archers high that can kill you quite fast when trying to farm them 
Bottom line is, Siptah never became the success Funcom hoped for, and I think some of the causes were that despite them adding some camps to main island + the south part shortly before full launch, it never really felt alive like Exiled Lands, also the buttload of recipes that instead of being learned in certain places, was hidden behind an RNG loot drop chance from special events like vaults, Grey pools and Surge.
In my opinion they took the lazy route and put all the fine details into loot.
Personally I like Siptah, it looks good and has some different features, but it feels a bit dead in too many places and half-baked compared to Exiled Lands, had it been a true expansion map where you could freely move between the 2 maps, then it might have been a different story 
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