Final answer:
David Easton's systems theory faced criticism for being theory-focused, lacking practical application, and being overly abstract.
Explanation:
One criticism directed towards David Easton's systems theory was that it failed to adequately address critiques from other perspectives and was criticized for being too focused on theory over empirical evidence. Another critique was that Easton's work was criticized for lacking practical application and being more theoretical in nature. Additionally, some critics argued that Easton's system was too abstract and not rooted in real-world contexts.
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