Do you track fruits and veggies?

Yes. 2-3 servings of fruit could really add up. 2-3 servings of non-starchy veg won't, but your numbers will be inaccurate.

I like to have my numbers as accurate as possible when tracking and I like to understand differences between days -- If I'm way over because I went nuts on pears (unlikely) or easily stayed under my cals because I ate a bunch of non starchy veg, I'd like to know.

Also I usually eat 10+ servings of veg plus a couple servings of fruit and I consider that important. For me counting is part of making sure I do that, and am not lying to myself.

When I was counting for weight loss being complete was helpful too.

Maybe think of this in a different way:

MFP is a calorie counting site. It's built around the concept that you eat in a style that works for you, count the calories, hit a calorie goal that's based on your personal characteristics and activity level, and thereby lose weight. You have calories to "spend" on whatever foods you prefer. (Most of us find complying with a calorie goal easier when we spend most of that calorie budget on nutritious, filling foods, but MFP doesn't try to force us to do that.)

Weight Watchers is a program for managing your eating to achieve weight loss and improve the quality of your diet. It gives you points to "spend" on food, but makes some of the nutritious, filling foods have a low cost in points, to encourage you to eat more of those foods. For that to work out, many people find that their assigned points effectively add up to a lower amount of food than would fit into MFP calories (i.e., they assume you're eating a good bit of the free foods, so they don't give you as many points to "buy" other foods with).

In your question, you're essentially asking whether it would make sense to use part of the rules from MFP, and part of the rules from Weight Watchers. The answer is mostly "no, it wouldn't make sense" (though there are ways you can make them work together if you understand what they're trying to accomplish). But it's like asking whether it would make sense to use part of the rules of Poker, and part of the rules from Go Fish, since they're both card games.

You can probably get away without tracking veggies, especially if you still have a good bit of weight to lose, but as you progress and have less wiggle room in your calorie budget, you may find that breaks down (especially if you happen to start eating more veggies along the way). Also, if you haven't tracked veggies, you'll have less accurate data available to help you estimate what changes you may need to make in your eating or exercise along the way, as your bodyweight or goals change. Neither of those issues is life-threatening, but it's worth considering.

Best wishes!