I flipped thousands of cards and saved up enough for Trout last week. I was tempted to use that money to instead buy four other LS collection gateway cards (or ten other good cards to really improve my DD team), but I spent all my friggin money and bought him (like you, I have also never packed him, I’m in my 7th year now, so I have also never had him so early). Worth it.
Mookie’s a great card but if you buy him, you may not get Trout until much, much later in the year. Wait, get him, and parallel level him up. Even if they release a 99 Trout later, it won’t be better than a 95 card with +5 parallel boost on top of Inside Edge.
Plus the advantage in quirks the LS has over “Special Edition” ones