I second this. The inside joke in communist circles here is that the MLPD are a fed op. Might be true, might not, but they are definitely sus and i don’t see them doing anything productive. DKP on the other hand, as you say, are solid and worth supporting and organizing with. Their weekly paper Unsere Zeit is also usually worth reading, though i would probably rank them second behind Junge Welt as far as leftist publications in Germany go, simply because the latter puts out more articles and has a bigger readership.