I think I'd be fine if the new Chandra had +1 shock a creature as an ability. Or even better 0, shock a creature or player, though that's probably OP.
As far as Chandra's phoenix and old RDW, that deck gave me an appreciation for agro. The games that didn't go turn 2 shrine, you had to work for your wins. But as others have said, the deck was fine and good(even if I hated stormblood berserker as a card).
It's also very true that "best decks" stifle innovation. That's why original Rav block was amazing. It was a tier 2 metagame from Kamigawa Rav->Rav-Spiral for the most part. I don't remember one truly dominant deck, so there were great rewards for innovating. Great decks from that Era:
Satanic Slight(Rakdos agro with dark confidant)
nGruul Aggro(multiple variations and Pro Tour winning decklist)
Boros agro(I remember an 18 land version because boros Garrison was that good. Also, boros swiftblade with sunforger anyone?)
Ghazi Glare(World Champion winning selesnya deck of amazingness)
The advent of Tapout blue focused on Keiga.
Draw Go dimir.
Tron decks of all flavors.
Solar Flare(actual solar flare)
Solar Pox(had a pox engine)
Angel Fire(dega and Raka versions)
Dragonstorm(ACTUAL COMBO)
Yada yada yada, I went nostalgic, I could go on. Best period of magic ever.
I don't have the "times of olde" for comparison, but I don't think current standard is all that stifled either. Junk rites is pretty much uncontestedly the "best" deck, but it isn't unbeatable or 80% of the meta.
We have:
UWr Control
UWr Midrange
Bant Flash
Bant Control
Bant Enchantments
Prime Speaker Bant
R/g Sligh
G/r Sligh
Mono Red
Jund aggro
Naya Blitz
Jund Midrange
Jund Smash
Gruul Midrange
Junk Rites
nB/w Tokens (I've seen some lists place, yeah)
Junk Tokens
Grixis Tempo (Fabiano)
Esper Control
Rakhammer
Dega Vampires
Dega Midrange
Aristocrats
Naya Midrange
That's off the top of my head too, I'm sure I'm missing a few.
Speaking of G/r sligh, anyone else notice that list? Its got mirrors to Red sligh, experiment one is like Stromkirk noble, Dryad militant is like Cackler except hoses UWr flash and rites off the bat.
Had 2 of Revenge of the hunted, 2 of fling, slaughterthorn and bloodrush out the ass. Also had vexing devils but hey >_>