1. We know very little of the plot, but so far I'd say it very much wasn't a redo of Donners film...
We know we have two new characters for one thing - Swanwick and Hardy.
And I don't remember a tornado in Smallville in the Donner films, does anyone else?
2. I never liked Singers attitude, and that makes for a big difference in my levels of cynicism. I already disliked him for his character destruction of cyclops in X-Men, and the he came into Superman with this 'Let's bring the Donner movies back to life' idea.
And he didn't even make a good movie out of it. Which could have been possible, even if I'd prefer a reboot than an after thought add on decades after the original.
He cast Routh for being a good lookalike for Reeve, he cast Bosworth because Spacey wanted her, he took Marsden with him from X-Men (proving without doubt that he has no regard for cyclops whatsover) and made up a character for him - a character that in itself caused one of the biggest moral controversies in a Superman story IMO.
The movie was dull, trying too hard to be a christ metaphor, and made the Superman character both unrelatable and a little unlikeable.
The suit itself was just very underwhelming. It looked plasticy and cheap.
Why are people less critical of Nolan/Snyder team up so far?
Because it's confirmed as a reboot. Because they have stated it will be a Superman we've never seen before, but something grounded in reality. Because the casting has all been unexpected but inspired. Because Nolan is someone the GA has been given no reason to doubt. Because Goyer knows his comic books. Because Snyder is very good at creating a visual masterpeice.
And because the suit is not underwhelming, doesn't look cheap, and is basically the opposite of all the complaints about the Singer one. (Blue was too light, red was too dark, no on liked the boots, or the t-shirt style neckline, or the cape).
I don't see any irony.