Not really, as for the first paragraph there will be some people where vaccine breakthrough happens as no vaccine is 100% effective at stopping infection. Given the massive surge is Delhi you’d expect healthcare workers to be exposed to high viral loads for extended periods and also they would be ones getting more testing so I’d assume it might be particularly noticeable in them - the key thing is if it was with symptoms and what the rate of hospitalization/death was. To date I haven’t seem any red flags to that effect.
As for the second antibodies aren’t the only way that the body fights the virus and what you see in the lab using serum does not necessarily translate to an impact in the real world.
We lack conclusive data and new evidence may emerge but I genuinely haven’t seem much to be concerned about for vaccinated people from this, or any other, variant.