Yes, you could land just about anything on the 1.5lb and the 12oz was the go to line for winter fishing when bites were hard to get. I loved the 2.2lb RT, and it was just the right strength for float fishing between the 1.7 and 2.6 BP, although Bayer subsequently introduced their 2.1lb.
Force is still available in the heavier strains and I've bought 250yd spools of 3lb and 4lb for only a few quid and found it alright for whip rigs as it's quite thin, 0.13 and 0.15 respectively, and has the right amount of of stretch. Also OK for hooklengths when ledgering.
I can believe it's fine on whips - I just found it was a bit too unruly on the reel, unfortunately. I recall using RT .75lb for canal skimmers/bream on rod and line (Sigma Canal, fibreglass). Looking at the way people crash "silvers" (ouch) out on commercials these days, it's hard to convey what finesse actually means. Grumpy old man? Sure. Happy to accept the label.