Last year, my wife went through RCIA to be received in the Church, and my 2 daughters went through RCIA to complete their Catholic initiation.
There were some “boring” interludes for them during that time, but none regretted the process. Even where teachings between Catholics and Protestants are very similar in the terms used, the basis of them is often very different. Each, for example, acknowledges sanctification, but Protestant theology knows nothing of sanctifying grace, and as a consequence, sanctification for them does not imply an actual transormation of the soul so that it is fit to enter heaven. Rather, a cloak of the righteousness of Jesus is thrown over it so that the Father sees his Son’s righteousness, not the state of the soul.
In his book “Letters to a Young Catholic” (and in other writings), George Weigel describes what he calls the Catholic “sacramental imagination”. No Protestant denomination has anything comparable, even the ones that may acknowledge the existence of some sacraments. It would be short shrift if someone were to enter the Church without a chance to develop that “imagination”, and RCIA is a good way to nurture that development.
That being said, the parish priest is the best person to assess the situation and determine the appropriate approach, but if he points towards RCIA, that would not be a bad thing.
Blessings,
Gerry