the answer might be yes. if i understand your question correctly. which i'm not sure i did.
the rules i summarized indicate that all inherited templates are converted to applied templates. they retain their special entry requirements, but can now be acquired mid-campaign. also, the templates given are broken down into levels. they do not have to all be taken at the same time, nor do you have to start off with the full LA. nor do you have to finish any given template. by inference, any template could be converted to a leveled format; however, this will require dm input and approval. is this what you meant?
however, if you meant taking two ecl +1 templates and mixing them to make a +1 ecl template or 1.5 ecl template... the only thing close to that is the variant half-fiend template rules. otherwise the answer would be no.