True Strike is often considered as a poor or at least very situational cantrip, as is also discussed in the question Why would I ever cast True Strike?. The consensus seems to be that its biggest issue is the action economy: It uses a "full" action, you need to keep concentration, and you only benefit from it on your next turn. However, the answers in the linked question also show that there are indeed situations in which this can be very useful. I really like the flavor of these scenarios: The epic fight against the BBEG in which a caster puts all of their focus into that one crucial blast that just MUST hit (for whatever strategic reason). I would like to see this in more games, but players hardly ever pick True Strike.
Assuming that players would like to have access to True Strike for the purpose of such a scenario, the main problem is its high opportunity cost: Most characters get only few cantrips, so choosing a cantrip with such situational benefit is not very attractive. If it were a 1st level spell, it would even get a bit weaker in the sense that it now would consume a spell slot, but accessing it can be much less of an investment: A wizard could learn it (maybe find it and copy it into their spellbook), and prepare it only on the adventuring day when they expect to fight against the BBEG.
Since the cantrip does not scale with the character level, changing it to a 1st level spell wouldn't need any further mechanical adjustments. Hence my question:
Would it be balanced to change True Strike from a cantrip to a 1st level spell in order to encourage players to choose it at all?