CASELOAD FORCING TWO-LEVEL SYSTEM FOR U.S. APPEALS
Crushing load of cases is forcing Federal appeals courts to create two-level system, in which tens of thousands of cases receive only limited reviews; some judges say changes are necessary to cope with increasing number of cases without extending wait for rulings; critics note that fewer than half of all Federal appeals are argued before judges, only fourth are rendered in full opinions, and many consist of one-word decisions; complex civil rights, antitrust and other such cases still get traditional detailed consideration but others deemed routine, such as prison petitions and individual disability claims, receive abbreviated attention; Judge Patricia M Wald says two tracks are allocated by non-judges on staff; reorganization and shortcuts introduced in 1980's explained; issue is now raised in Florida as former county commissioner Vicki Lopez-Lukis appeals her conviction for taking payments from lobbyist, Sylvester Lukis, with whom she was then having affair; two are now married; photo; graph on court caseloads (M)