In no particular order:
(1) Obsession with solo-authored work. Science is increasingly becoming a team effort.
(2) Disdain for interdisciplinary work and not reading/citing literature in other fields (health, psychology, CS, neuroscience, etc).
(3) 4-5 years publication cycles -> strict 2-3 months review deadlines (AER and QJE are getting there).
(4) Obsession with top-5 journals, which sustain their monopoly and still publish (in some cases) 4 issues a year with 8 papers per issue (compare to other disciplines: weekly top journals with 20-30 papers per issue) while the number of people in the profession is growing every year.
(5) Obsession with pedigree.
(6) Mindless bashing other fields within the discipline (eg. macro or lab experiments).
(7) Observational analyses and dubious instruments -> experimentation (field, natural, lab).
(8) Conference selection; just let all the grad students present posters as any other scientific discipline does (besides CS).
You might find some of these suggestions questionable. It's OK.