I think Classics is certainly an easy term to use, in general... like in the comparison photos section, or news topics that have a redeco of a mould that was in more than one of the noted sublines.
This wasn't asking for a renaming of individual toys as to their individual sub-line, as some had jumped on... this is for generating/agreeing on a term for a 'mould class' - for example, 'The XXXXX Seeker's mould'. What do you call it so that everyone knows you are not talking about Gen1, Movie, Robotmasters, Titanium, Robot Heroes, etc?

As one who posts most news items here, and generates the toy checklists here, I want to be using a term that collectors are going to easily recognise, without causing confusion. Obviously, figures will be sorted/noted according to packaging/sub-line, but referring to actual moulds, in terms of redeco or theme/homage, it can be confusing if more than one term/label can apply. Especially when packaging has become an unreliable indicator, after Walmart 'Classics' in Movie packaging, Energon figures re-released in Universe packaging, and Gen1 homages in TF2 packaging...

So, even though there was an actual Classics series in 2006-2007... referring to a mould as a Classics mould, can actually refer to any of the related, follow-up sub-lines. Okay?