Tony Vargas
Legend
That's still 'situational.' If you're hanging back and casting from comparative safety because the situation permits, you're not being interrupted.Situational balance is only one part of pre-3e spellcaster balance. Other important aspects include at least spell interruption and side effects (system shock etc.).
Though what 'side effects' you mean, I don't know - D&D has never had anything like Shadowrun 'Drain' that I'm aware of.
It's just an example of 'traditional balance,' which included the things you mentioned, as well as balance across levels.Personally, I would like to see all other balancing factors return, except balance across levels, which was the only one mentioned in the poll.