Byrne and Bateman Hold Final Debate
Byrne and Bateman hold 11th and final debate, TV int involving both men; Byrne attributes his gain in polls to Bateman's decision to make leadership an issue and voters' concern over Bateman's alternative revenue program; denies newsman Robert Miller's claim that he (Byrne) said he planned to increase income tax; Bateman scores Byrne for loss of mfg from state, failure to ease unemployment or to make use of Fed hwy funds owed state; illus of candidates (M)