Wearing my parent-of-a-current-high-school-senior hat, I must confess that I would have been delighted if my son had had an opportunity like this … to kick butt in 10th and 11th grades in a rigorous IB program and then to get the chance, in grade 12, to pursue an internship along with some travel and atypical classes of interest.
However, admission officials can be snooty … especially at the hyper-competitive colleges … and your concerns about how a fluffier senior year may be viewed are certainly warranted. And an applicant who has not completed four years of English could indeed be in hot water at many institutions, particularly the public ones where the admission staff may not have as much wiggle room as the private-college officials do when it comes to granting leniency to candidates who have not met the four-year requirement. BUT … from what you’re saying, it sounds as if the Accelerated IB students at your daughter’s school do take English in their senior year, just not a class that is designated IB, AP, Honors, etc. I think that’s fine.