Neighbourhood success is a tough thing to define and agree on. Are we measuring it by quality of public space and number of condos sold? It would be easy to agree that EV is successful on these terms. The spaces are well designed, increasingly animated and active, with only more activity attracted with each new development. It still feels contrived in some ways, but as the "new" label transitions to the "its how it is" over the next few years that feeling of artificiality will recede.
The one area I am a bit concerned about in East Village it's its long-term vibrancy. As it's been developed so far, it's a wealthy, downtown, young professional neighbourhood plan with the exception of the few seniors towers in the south end of the neighbourhood. EV has failed so far - like many new master plan urban developments in Canada - in this respect. New housing is always expensive, so its difficult for a development project like EV to really attack the structural affordability issues that are larger than itself.
I also looking forward to EV transitioning in the coming years. I expect it to land somewhere on the continuum between Eau Claire and the Beltline.
The Beltline scenario will see the neighbourhood transition with different building formats coming online and the ageing of the existing stock to produce a variety of housing options, prices etc (and therefore a diverse set of residents). Flexible retail designs, mixed-use programs will allow the neighbourhood to be increasingly active and vibrant with a range of services (imagine by 2030 if EV had an actual real dive bar as opposed to a expensive fake dive bar for downtown elites!)
The Eau Claire scenario may happen if the transition described above doesn't happen for some reason and the neighbourhood stays relatively homogeneous by income. Dense, but expensive, fairly tame and homogeneous (albeit perhaps locked at a younger demographic). More Nationals (I heard a rumour one was heading to EV already), more Cactus Clubs etc. This is the "new Vancouver" route: a clean, award-winning, beautiful, Instagrammable - but ultimately boring place for those than can afford it. This option is not the ideal outcome for an inner city urban area like EV. Diversity in housing style/size/affordability, mixed use development, and a bit of chaotic interaction between visitors/residents/young/old/rich/poor is a better outcome for such a prominent and accessible area.
Right now there is plenty of evidence that supports either outcome happening in the long-run (perhaps most new places eventually end up somewhere in the middle regardless of efforts to support either vision). EV really is an exciting "development", but I look forward to the day it is no longer considered a development at all and just becomes another weird little neighbourhood that people live their lives in. It was once that before and with a bit of luck it will return to that.