Most, if not all locomotives on that list are wrong in some form or way, you might as well just tool new tooling. Austrains 421's have a few large faults to them, as do the 442.
I also wouldn't touch the Auscision GL if the used the Austrains 442 mech. (Never seen so much slop in mechs until buying Austrains)
The 49 and 47, from what I've been told would have to be completely re tooled to do modern versions. I asked TrainO about doing modern versions a while ago on Facebook.
I've always thought the 44 was a perfectly acceptable model as is (save for the gears), and all versions have been done.
Traino have confirmed the SSR GM is being done by themselves on Facebook.
S317 also has a different nose profile after a prang or two under VR so you'd need a new tooling there. S302 has has some mods under WCR/ELZ and would be different again so more retooling
SSR G's? It in theory could happen, but with the whole 1st series T/P class saga kills that idea.
The Austrains C class tooling needs serious updates detail wise (and probably electronically as well)
And from what I know, the 1st Series X classes are brand new from the ground up (maybe except for bogies which are used under B/A classes).
The intelligent modellers have caught on that they are just baiting people for a bite, well because they've learnt it'll happen irregardless of the model being released or not.
Given that all the Austrains Loco's, including their current new ones, G/BL/81 are manufactured at the old factory, which also produced the Eureka models, up to & including the 40cl if it eventually gets here from them, likewise all the old models from TOR, except I think the GM's, not sure but maybe the 42's as well.
Eureka has had to have SDK finish off models they had tooled as to have them shipped to the new factory also would have meant new mechanisms & motors, same as with Austrains, & that is what has happened with the TOR GM & 48cl as they have had to have new mechanisms made to accept the motors from their new factory. They have also said on several occasions that all their locomotive models have had or will have all new mechanisms & motors made up for their production at the new factory.
I know John Eassie has said in recent times that he is finishing up, & at the brickpit mentioned his last new model is now under production, when he actually finishes is something that will come out over the next few months, & most tend to think this years Liverpool exhibition may be his swangsong.
What happens to the old tooling's is an unknown ATM, but how much of them would really be acceptable in this day & age, I would imagine the NR class tools will be past their use by date with the next run, owing to how many models have come out from them so far, thus they are likely past their use by date.
If anyone was to buy the company out, I would see the old toolings being of no real value unless some can be salvaged, but for me, given the prices that Auscision is still charging for new diesels, especially if you pay in full prior to delivery, they can at least get new models out with much better overall quality than it is possible with the old Austrains tooling's, also they would not need to rework them for the mech's & motors from their current suppliers.
Maybe, just maybe Auscision & Austrains have reached an agreement for the future, & the photo's are warm ups for the future announcements, maybe not also & just a teasing. Time will tell though.
One thing though, & while this is an Auscision thread & this is a bit off topic, if John Eassie does decide to retire & sell, & I for one wish him all the best in retirement as I think he deserves it, especially with the recent problems at SDK taking its toll along with the ones from them in the past few years, who can blame him & even the others if they too decide to pull the plug, which I do not think they will.
I do think though that what John Eassie has done over the years has served all of us well, as has all of them.