I am wondering if the lagoon view would make the trip more magical?
Most definitely, of course it will!
Is the lagoon view at the Poly worth the additional cost?
"Worth"is a subjective thing, only you can answer that. First of all, consider if you can afford it easily and won't miss the money when the bills come. Then decide if you are someone who would "rather" spend your money on souvenirs, or an extra special dinner or tour, or if you wouldn't spend the money on anything else really, but would rather be saving it for a rainy day or retirement, than you will see the money as "extra" that didn't need to be spent, you would be thinking about how much that view cost, and how that compares to other things you might spend the money on--and noone can tell you that but you. Is it worth it for you to spend money on souvenirs? Maybe, but I can tell you I never buy souvenirs, I hate them and I hate shopping, so for me, spending money on stuff to take home is a waste of my vacation time and money. If you love shopping and taking Disney things home to remember your vacation by, then souvenirs are worth every penny to you.
For us, we prefer having the magical view and feeling pampered in our resort choice, so it's worth every penny. I find if you ask about "worth" then you already know the answer. You probably won't feel comfortable doing it. ( I just mean that by asking, you apparently already feel somewhat uncomfortable with the choice)
Now all that being said--my advice is go for it! You WILL love the magical view, and you will never forget it!
