My thought on this is that the only ones with a 1+ initiative are the big super-heavies (Trains, Colossi, Cyclops, Leviathans). Other players have felt that these beasties deserve an extra somethin' to feel more unstoppable.
MikeT had suggested an 'implacable advance' rule to allow it to move/shoot even on a hold.
Ironmonger had suggested a 'relentless' rule to ignore the -1 on initiative rolls.
While neither of these rules took hold in our discussion, they do reflect a desire for players to make the WEs feel more unstoppable-er.
A +1 to their rally would be an interesting way to reflect that and keep the universal rule. This means the big guys will have the following rally points:
BMs with no enemy within 30cm: automatic (no change)
BMs with enemy within 30cm: automatic (+1 improvement)
Broken with no enemy within 30cm: 2+ (+1 improvement)
Broken with enemy within 30cm: 3+ (+1 improvement)
If we don't, I am not sure how we can make a universal stubborn rule that incorporates that +1 modifier. Make everything, including the big WEs, a 2+ initiative? I'm open to suggestion.
The WEs are divided into two groups, much the same way titans and SHTs on the IG list are. It was an arbitrary decision I must say, however. If the 1+ initiative and a +1 to rallies is too much, we can just make everything 2+. It would give everything in the list a 1.5+ Average Initiative (rallies and activations). I don't think that has ever been done before but that isn't necessarily a bad thing. Piggybacking on Borka's comments, the 1+ initiative was hand-in-glove with the 10cm move. If we move them to a 2+ initiative, I would be more inclined to put all the big WEs at 15cm moves.