The peak was definitely during the Applegate/Action News era. While it tested the limits of what was considered journalism. It definitely brought WOIO to a new level of success, along with WKYC rising out of the doldrums for the first time.
Romona's return was probably the last major investment, and this was after WKYC couldn't afford her anymore. The same had happened two years before with Tim White.
As the Applegate era was drawing to a close, so was the growth of Raycom and eventual merger with Gray. The "Cleveland 19" era was a mistake, it softened the newscasts too much and Raycom began to treat WOIO like another middle-market station. They had made the same mistake in their first go-around as "Hometeam 19/43" as the stations were indistinguishable from their cohorts across the country.
Yes, the "19 News" was the oomph that WOIO needed, but it's too little too late given all of the slashing and burning that took place. They literally stacked the deck during the "Cleveland 19" relaunch with way too many poached anchors in the same place, and virtually all of them were gone within a short while.
Meanwhile, WUAB was left to wither and die under Raycom, being overtaken by WBNX soon after, and WUAB only got the CW as a result of all of the Ernest Angley foreclosure drama.....and CBS's desire to put it on a major-grouped station.