Your welcome flow isn't welcoming anyone.
Most welcome sequences do one thing well: they confirm that the email address works. After that, they're a list of features nobody asked about, delivered on a schedule nobody set intentionally.
The real job of a welcome flow is to close the gap between why someone subscribed and what they actually need to do next. That gap is almost always bigger than brands expect — and almost always ignored.
A welcome flow shouldn't introduce your brand. It should figure out who this specific person is and route them accordingly. The brands that get this right don't have a single welcome series. They have several — triggered by different entry points, with different tones, different content, different pacing.
The ones that get it wrong have one flow for everyone, updated once in 2019.