If it’s MIT code derived from MIT code, in what way is its openness ”quasi”? Issues of attribution and crediting diminish the karma of the derived project, but I don’t see how it diminishes the level of openness.
FOSS licensing can only exist in terms of Copyright. Without Copyright, you cannot license FOSS. If something has an incorrect Copyright attribution, then the license can be viewed as invalid until this deficiency has been corrected (obv. depending on local laws, etc).
On top of this, it would not be unreasonable for the numerous authors of llama.cpp to issue DMCA takedown requests if Ollama is unwilling to correct it.
