I think it'd have been better if they expanded the parts where Okabe traveled into the far future instead of rushing it like they did. The last 1/4th of the series was definitely 9/10 for me, but everything before that was a bit of a slog.
Maybe SG was paced the same way, but given this is meant to be watched after SG, I thought there'd be less slice-of-life and more diving into the alternate timelines thay led to the ending of SG.