No speed - I hear ya and agree
Huggie - disagree
Why would it be a bad habit if it produces a better result and avoids the roller coaster?
Just a matter of being aware of what situation you have put yourself into and monitoring accordingly.
However, in icing/level 2 on, it may well be more prudent to use IAS mode, particularly at the higher end of the weight scale where there is less margin between red bug and climb speed.
Have you ever sat down the back of a 72 when some goon up front has been climbing in IAS mode while the crew are pushing carts up and down the aisle??