LONDON, March 17 : Chelsea's Champions League exit on Tuesday after a thumping 8-2 aggregate defeat by Paris St Germain means the big-spending Londoners and their U.S. owners are once again trying to rescue something from the tail-end of a chaotic season. Having promised to end the carousel of managers at Stamford Bridge under former owner Roman Abramovich, the BlueCo consortium who took over in 2022 must now decide whether to stick with their bet on the inexperienced Liam Rosenior. The 41-year-