PowerPoint Business Frameworks Enhancement - No. 2

I'm seeking help to enhance my existing PowerPoint template and create a new design for it. The current template includes several frameworks (executive summary, Porter's five forces, McKinsey 7S, BCG Growth Share Matrix, PESTLE, SWOT), and I'm looking to add slides for the following frameworks in the same style:

1. Value Chain Analysis
2. Ansoff Matrix
3. McKinsey Three Horizon Framework
4. Balanced Scorecard
5. OKR Framework

Additionally, I need assistance in ensuring that I can change the colors in the master template to different variants for this template.

The second part of the project involves building a completely new slide template with the same slide content but in a different style, which will need to be suggested.

- The new slide template should adopt a "Modern and Sleek" style.
- The primary goal for the new frameworks' slides is to achieve a "Professional Appearance".

Ideal candidates for this project will have:
- Extensive experience with PowerPoint
- Strong understanding of the listed business frameworks
- Proven ability to create visually appealing and consistent slide designs
- Skills in suggesting and implementing a new, modern design style.